Because they're not out there, they're already here!
Okay, maybe not. But if they were here you'd need a journal to chronicle every encounter, right? Like, maybe your boss is an alien (always knew that dude was sketchy), or that guy or gal you met last night. Definitely the barista at your favorite coffeehouse because no human is that cheerful! Whatever. You just need the right book to document all the weird stuff that happens in your day.
Try this 6 x 9 paperback journal with 200 ruled pages decorated with whimsical alien doodles and random facts about outer space on for size. It won't protect you from x-rays but it is stamped TOP SECRET on the back cover to keep out pesky prying eyes and men in black.