Sixteen-year-old Kari juggles saving her spy parents while impressing the guy she's been in love with forever.

At the bidding of a voice on a phone, sixteen-year-old Kari and her friends from Generation Interpol, a spy training facility, race around Europe to fulfill a l

Three former CIA officers--the world's foremost authorities on recognizing deceptive behavior--share their techniques for spotting a lie with thrilling anecdote

The instant New York Times bestseller from the author of the Newbery Medal winner When You Reach Me: a story about spies, games, and friendship. The first day G

Crazy-but-true stories about the natural world make this acclaimed nonfiction series perfect for fans of curiosities and wonders—and anyone looking to explore