by Eric Flint, Ryk E. Spoor

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The second book in the popular Boundary SF adventure series co-authored by multiple New York Times bestseller Eric Flint and Ryk E. Spoor.

When the strange fossil she'd discovered gave her a trip to Mars, Helen Sutter thought she'd gone about as far as any paleontologist would ever go in her lifetime. But when you’re married to an overconfident super-sensor expert for the only private agency in space – the Ares Corporation – and your best friend is a former secret agent for the Interplanetary Research Institute of the United Nations, there's always somewhere farther to go.

Soon Helen’s new discoveries will lead her to the mysterious asteroid Ceres and beyond in a desperate race to reach Jupiter's perilous miniature system of radiation-bombarded moons. It seems the next gold rush is on–for alien technology.

And there are people willing to do anything to get it – even if they must start the Solar System’s first interplanetary war!

Praise for the Boundary series:
“A genial, fast-paced sci-fi espionage thriller [that is] light in tone and hard on science...” –Publishers Weekly on Threshold

Product Details

ISBN-13: 9781451637779
Publisher: Baen
Publication date: 05/29/2012
Pages: 464
Sales rank: 672,360
Product dimensions: 4.30(w) x 6.56(h) x 1.01(d)

About the Author

Eric Flint is a modern master of alternate history, with over three million books in print. He’s the author/creator of the New York Times best-selling Ring of Fire series. With David Drake he has written six popular novels in the “Belisarius” alternate Roman history series, including, and with David Weber collaborated on 1633 and 1634: The Baltic War. Flint was for many years a labor union activist. He lives in Chicago, Illinois. Ryk E. Spoor, while earning his masters degree in Pittsburgh, became a playtesting consultant and writer for the Wizards of the Coast, the leading publisher of role-playing games and related novels. He now lives in East Greenbush, NY, working as a technical proposal writer for a high-tech R&D firm, and spending his non-writing time with his wife and sons. Baen published his first novel, Digital Knight, in 2003.

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Threshold 3.7 out of 5 based on 0 ratings. 3 reviews.
BK95 More than 1 year ago
Great book!! It passes the time well and kept me entertained. Good byplay between the characters and lots of action. A little far fetched but that is why I read sci-fi. I highly recommend this and the one before this one to other sci-fi techies like myself.
PortiaLong on LibraryThing More than 1 year ago
Having not read the first book in this series yet I can't comment on the series as a whole or how this book builds upon the previous. There WAS, however, enough explanation of the backstory to allow me to enjoy this book well enough on its own.Fast-paced with an "action-adventure" feel but with enough of a nod to science to allow me to suspend my disbelief. A few too many "new" technologies for my taste, but that may be in part because some of them were freshly "new" in the first book. By this I mean that sometimes it seemed that the characters would introduce a new capability of their technology just in time to "save the day" ("Hey, Rocky, watch me put a rabbit out of this hat..."")Certainly readable and I might enjoy it even more when I go back and read the first book - I'll let you know.
readinggeek451 on LibraryThing More than 1 year ago
A few years after the events of Boundary, the space race is heating up as several more political entities are given engines. Ares Corporation has a money crunch, but finds a new Bemmie base on Ceres. The European Union is feeling shut out and forms a grand plan to steal a march on Ares via industrial espionage. A sociopathic security chief makes the situation worse, as the race for a possible base on one of Saturn's moons turns into a grand chase.