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Chronal Engine

Chronal Engine

by Greg Leitich Smith, Blake Henry (Illustrator)

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When Max, Kyle, and Emma are sent to live with their reclusive grandfather, they think he’s crazy, especially when he tells them about his time machine. But after Emma is kidnapped at the exact time that her grandfather predicted, Max and Kyle are forced to believe his eccentric stories—even the one about the Chronal Engine in the basement.

Now, to


When Max, Kyle, and Emma are sent to live with their reclusive grandfather, they think he’s crazy, especially when he tells them about his time machine. But after Emma is kidnapped at the exact time that her grandfather predicted, Max and Kyle are forced to believe his eccentric stories—even the one about the Chronal Engine in the basement.

Now, to save Emma, Max, Kyle, and their new friend Petra must pile into a VW Bug, and use the Chronal Engine to take the road trip of a lifetime—right back to the Cretaceous period. With dangers all around, the teens find themselves dodging car-crushing herbivores in addition to the terrifying T. rex. In this ancient environment, can three contemporary teens hunt down a kidnapper, forage for food, and survive long enough to return home?


Editorial Reviews

Children's Literature - Cherie Haas
Dinosaurs, time travel, mystery and adventure—this novel for teens has it all. A pair of young siblings is delivered to their distant grandfather for a summer that spans millions of years. Their grandfather leaves them little clues, and so when Emma, the missing star of the novel, is snapped by someone from another time dimension, Kyle and Max have no choice but to save her, their only sister. A new friend named Petra comes along for the adventure, and before you know it, they are four-wheeling past T-Rexes in order to find her and bring her back to the present they know. Fortunately for them, Max, who is the narrator, has studied dinosaurs like a good adolescent boy. He's able to guide the group away from tremendous danger, and calm fears when they encounter vegetarian beasts. The characters are believable and likable, and the story carries itself quickly along. Black and white illustrations effectively give the reader a nice visual of the happenings as well. Reviewer: Cherie Haas
VOYA - Amanda MacGregor
While their mother spends the summer digging for dinosaurs in Mongolia, teens Max, Emma, and Kyle stay with their crotchety and reclusive grandfather. Though not excited to be there, they are curious to finally see the chronal engine, an alleged time machine built by their great-great-grandfather. Before long, they must figure out how to work the time machine when Emma is kidnapped and disappears right in front of their eyes. Together with their new friend Petra, Kyle and Max set the Recall Device and go back in time. When they land in the Late Cretaceous period, their rescue mission is complicated by dinosaurs pursuing them at every turn. Fortunately, Max is a budding paleontologist and is able to put his vast knowledge of dinosaurs to use. Though the idea is intriguing, the execution leaves much to be desired. Riddled with holes and loose ends, the confusing plot is difficult to follow. The technical names of dinosaurs and their habits and characteristics take over the thin plot. Though the story requires an obvious suspension of disbelief, the teens' willingness to accept the time machine and their intuitive ability to know how to use it stretches credibility. The topic seems more suited to a book aimed at a younger audience, and garish anime-like black—and-white illustrations, which do little to enhance the story, further skew the age group younger. Only the most die-hard dinosaur aficionados will go for this confusing adventure. Reviewer: Amanda MacGregor
Kirkus Reviews
A Back to the Future–style romp through time, though with more loose ends than a bowl of spaghetti. Hardly have teen twins Kyle and Emma and their younger brother (and narrator) Max arrived for a stay at their reclusive grandfather's Texas ranch than the old man announces that he's about to have a massive heart attack, shows them a working time machine in the basement and sends them out to a nearby paleontological site where they find fossilized sneaker prints among the dinosaur tracks. Then a stranger grabs Emma and vanishes in a flash of light--leaving the remaining sibs and a ranch hand's bow-wielding daughter Petra to zoom in a Volkswagen Beetle back 70 million–plus years to the rescue. Not only does the late Cretaceous landscape turn out to be well stocked with crocodilian Deinosuchus and other toothy predators, a human gent falsely (as it turns out) claiming to be a refugee from 1919 steps out of the bushes to guide the others to the evidently dino-proof frame house in which Emma is being held. Everyone steams back to the present on the kidnapper's motor launch, which is also fitted out as a time machine. Showing blithe disregard for potential paradoxes, the author sheds enough light on his byzantine back story to ensure that the protagonists will be taking more trips through time and closes with notes on dinosaurs and on the history of "Robinsonades." Action and enthusiasm aplenty, but, like most time-travel tales, not much for internal logic. (recommended reading) (Science fiction. 10-12)
From the Publisher

"The short length, breathless pace, and graphic-novel-esque, full-page illustrations might make this one appealing to reluctant readers."--School Library Journal

"There's peril aplenty, but Smith keeps the tone light and easy, making this accessible to younger readers averse to anything truly scary."--Bulletin

Product Details

Houghton Mifflin Harcourt
Publication date:
Product dimensions:
5.78(w) x 8.28(h) x 0.74(d)
750L (what's this?)
Age Range:
10 - 12 Years

Read an Excerpt

Chapter I Today

Just how much of a creepy old hermit man is he, again?" my sister, Emma, asked as Mom drove us up the hill to my grandfather’s ranch house.

It wasn’t a ranch-style house, but a house that sat on a five-thousand-acre ranch with cattle and everything.

The building itself was a three-story 1890s Texas Victorian mansion built into the side of a hill. It had a cupola, a raised wraparound porch with outside ceiling fans, and burgundy and purple trim around the windows and eaves.

"Because this doesn’t look that bad," Emma went on, glancing at us in the back seat. "What do you think, guys?"

My brother, Kyle—Emma’s twin—just grunted.

"Max?" Mom prompted.

"It’s, um, freshly painted," I said, which, okay, wasn’t much better than Kyle’s grunt, but still.

"It’s exactly as I remember it," Mom said as she brought the Tahoe to a halt.

Kyle grunted again. It had been two weeks, and he still hadn’t forgiven Mom for springing the news on us that she’d been offered a position (and a fast-track grant and visa) to go to some remote corner of Mongolia on a dig for feathered dinosaurs that were supposed to be even more spectacular than the ones from Liaoning Province, China. It was very last minute, but the paleontological institute over there had asked for Mom—Dr. Ernestine Pierson-Takahashi—"by name," she’d said. It was apparently an enormous compliment, a terrific opportunity, and one of those things you couldn’t say no to.

With our dad having died five years ago in Afghanistan and my uncle (Mom’s brother) working in London, that left my grandfather as the only one who could realistically have taken us in. And so, in an act of extreme desperation, Mom had asked her father if he’d do it, and, to her enormous surprise, he’d said yes.

The thing was, despite the fact that the ranch was only thirty minutes from where we lived in west Austin, Mom had seen Grandpa only once in nearly fifteen years, and the three of us had met him only on that same occasion, at Dad’s funeral.

Supposedly, Grandpa just decided one day that he’d had enough of people and family, and people like family, and since then had left the ranch just that one time. The only humans he talked to were his ranch foreman and the lady who cooked and cleaned for him.

From what I understood, this sort of thing wasn’t completely unusual in our family: the guy who’d built the house—my grandfather’s grandfather—was nicknamed "Mad Jack" Pierson because he’d spent most of his fortune to build what he’d claimed was a time machine, which he called the "Chronal Engine."

Not surprisingly, he’d died a recluse.

So Kyle, Emma, and I weren’t exactly thrilled to be trapped all summer in the middle of nowhere on a ranch with a complete stranger. Probably I was most looking forward to it, because I was the only one of the three of us who’d picked up what Mom called the family "dinosaur gene." She had it, she’d said, from having grown up here. (This isn’t how genetics works, of course, but sometimes my mother is ironic.)

Anyway, the ranch was home to the famous Loblolly Dinosaur Tracks, sets of fossilized Late Cretaceous footprints attributed to Tyrannosaurus rex, among others, in one of the Colorado River tributary creeks that ran on the ranch.

I’d never seen the tracks, of course, and neither had an entire generation of paleontologists—my grandfather had caused something of an uproar when he’d stopped allowing them onto the ranch, too. My mother was still hearing about this from unhappy colleagues and the occasional frustrated PhD candidate.

As we got out of the car in front of the house, though, it was hard not to be impressed. The mansion was situated on a hill above the Colorado River and had an incredible view. We could see for miles in every direction: the river snaking its way, eventually, to the Gulf; the pines and live oaks; the hills of McKinney Roughs rising in the distance; and the gathering rain clouds.

"Little Buddy Creek is down that way." Mom gestured vaguely toward the woods off to the left, where the dinosaur tracks were.

As Kyle and I pulled our suitcases out of the back of the Tahoe, the front door of the house opened and a seventy-ish man, leaning heavily on a black lacquered cane, strode across the porch to stand at the top of the steps. He was tall—taller than I’d expected—had bushy white hair, and was wearing boots, jeans, and a red, long-sleeved Western shirt.

He paused, peering down the flight of stairs.

"Hold on a second, kids," Mom said, then ran up to greet him. She and her father hugged for a long moment.

After they talked for a while, she gestured for us to come up.

Up close, I thought our grandfather looked more like the twins than me. He had Emma’s dark eyes and good posture, but Kyle’s straight nose and unruly hair.

He gave each of us a long, appraising look.

"High school?" he asked the twins.

"Freshman year," Emma answered. "In the fall."

"You’re the one who plays football?" he asked Kyle.

My brother nodded. "Hoping to make varsity this year."

It was one of the reasons Kyle was so angry about having to come here. He and his friend Jordan had had great plans for "off-season conditioning" this summer, which, so far as I could tell, involved a lot of running and the repetitive lifting of metal plates. Mom had told him that Uncle Nate’s old weight set was probably gathering dust in the basement here, but Kyle was still mad.

Personally, I didn’t think the two of them had much of a chance at varsity, anyway, but I wasn’t going to say that aloud.

"And you’re the flutist?" Grandpa asked Emma.

"And the swimmer and the lifeguard trainee and the math geek and the hospice volunteer and the sister," Emma said with a bright smile that had kind of an edge to it. "I’m a lot of things."

Everything she’d said was true, and she did them all well, which was occasionally irritating, especially when people asked me what I did.

When they bothered to, anyway.

"Dinosaurs?" they’d repeat, and give me kind of a funny look.

"And you’re Max?" Grandpa said to me.

I nodded.

He stared at me for a moment. "Eighth grade?"

I nodded again. "In the fall."

He just squinted at me, but had no more questions. "Y’all can have the run of the place," he said finally, "so long as y’all don’t stampede the cattle and don’t bother me none, either."

"See? It’s not so bad," said Emma, who is almost always optimistic but not annoying about it.

After Mom had left (with that pinched look and the line between her eyebrows), the three of us had been introduced to Mrs. Castillo, Grandpa’s assistant/nurse/cook.

Then we moved our things into our respective rooms on the second floor. Kyle and I were in rooms with a connecting door, and Emma was across the hall.

Once I’d dumped my clothes into the dresser drawers and plugged my laptop in to charge, I headed downstairs to the parlor to look around. (I knew it would take Emma and Kyle a lot longer to unpack because they believed in hanging up and folding their clothes.)

Like all the rooms in the house, the parlor was centered around a fireplace. This one was built of some green tile and was topped with a black granite mantel. A seating area—including a cowhide sofa and leather pillows, a pair of wing chairs, and a coffee table—faced the fireplace. To the side stood a five-shelf leaded-glass barrister’s bookcase filled with books about the Loblolly Tracks.

When it began to rain, I flicked on a reading lamp, pulled one of the books off the shelf, and stretched out on the sofa to read, careful of the volume’s yellowing pages. The book had been published in the early 1940s, about fifteen years after the discovery of the tracks themselves, so its discussion of dinosaurs was mostly out-of-date. Tyrannosaurus rex did not drag its tail, and the sauropods probably weren’t swimming.

I was deep in the details of how James R. Wainwright, a prospector for Humboldt Oil, had stumbled upon the footprints, when I felt hands drumming my head.

"Kyle," I said, turning around, to see him and Emma. "You’re such a—"

He snatched the book from my hands.

"Hey!" I tried to grab it back, but not too hard, because I didn’t want to tear the pages.

"Don’t be such a big giant dork," Kyle said, tossing the book onto the wing chair next to him. "Let’s go explore!"

"I was reading, you troglodyte." I did wonder about Kyle’s sudden enthusiasm for the place. Maybe Emma had talked to him. Or maybe he was just bored. "It’s raining, or, believe me, I’d’ve already been out to see the tracks myself by now."

We were interrupted by the sound of someone clearing his throat. Without a word, Grandpa strode from the arched entryway, around the front of the coffee table, to stand by the wing chair. He picked up the book, leafed through it once. "Boy your age should be outside in the summertime."

I began, "But—"

"Out! All of you, out!" he said, waving the volume in the air.

Emma opened the front door and led the way onto the porch. As I looked back, Grandpa made another shooing motion.

I closed the door behind us and stepped across the porch to look at the view.

Emma sat cross-legged on a wicker patio chair. "What was that all about?"

"Boy your age shouldn’t be sitting around reading," Kyle said, in a passable imitation of our grandfather. He paused. "What was the book?"

"Why?" I asked, suspicious and still annoyed with him. I sat up on the porch railing and grabbed the column to balance myself.

"He took it with him," Kyle noted, as he eased himself into a wooden rocking chair. "He didn’t put it back on the shelf."

I didn’t know why Grandpa would’ve wanted it. "It was just about the history of the place."

After a while the rain stopped, and as we sat watching a pair of hawks circle overhead, a girl about our age came marching up the driveway.

She caught my attention for a couple reasons.

First, she was really attractive. She was a little shorter than me and lightly freckled. Her dark hair had been pulled back in a ponytail.

Second, she was carrying a recurve hunting bow in one hand and a game bag over her shoulder. She clomped up the steps in her hiking boots and dropped the bag onto the porch.

"Y’all like rabbit?" she asked, lifting an eyebrow.

"Tastes like chicken," Emma replied, although not from any personal experience that I knew of.

"Good," the girl answered, "then you can help me dress ’em."

"What about us?" Kyle asked. He put on his most winning smile, so I could tell he thought she was cute too.

She gave him a long look and me a shorter one. "Y’all can catch your own."

At Emma’s laugh, the girl picked up the game bag and led my sister around the wraparound porch to the back.

Turning the corner, she looked over her shoulder. "My name’s Petra. My mother works here. Pleased to meet you."

She didn’t wait for us to introduce ourselves.

When I figured the two were out of earshot, I told Kyle, "I don’t think you’re her type."

He grinned. "Maybe it won’t be so bad here, after all."

What People are Saying About This

From the Publisher
"The short length, breathless pace, and graphic-novel-esque, full-page illustrations might make this one appealing to reluctant readers."—School Library Journal

"There's peril aplenty, but Smith keeps the tone light and easy, making this accessible to younger readers averse to anything truly scary."—Bulletin

"This is exactly the book young dino fans would write themselves, crammed with sandbox-style action and positively packed with words like Nanotyrannus and Parasaurolophus."—Booklist

Meet the Author

Greg Leitich Smith lives in Austin, Texas, with his wife, author Cynthia Leitich Smith, and four cats.

He is the author of NINJAS, PIRANHAS, AND GALILEO and its companion book, TOFU AND T.REX. He and his wife, Cynthia Leitich Smith, are the co-authors of the picture book, SANTA KNOWS, illustrated by Steve Bjorkman.

A patent lawyer by day, Greg holds with academic honors: a bachelor’s degree in electrical engineering from the University of Illinois, Champaign-Urbana; a master’s degree in electrical engineering from the University of Texas, Austin; and a juris doctor from The University of Michigan Law School, Ann Arbor. Visit him at www.gregleitichsmith.com.

Blake Henry is an animator and comics artists in New York City. He graduated from The School of Visual Arts.

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