C. Alexander London (www.calexanderlondon.com) is the author of Proxy and Guardian, and the middle grade series The Accidental Adventures, Dog Tags, and Tides of War. A former journalist and children's librarian, Alex is now a full time writer in Philadelphia. You can follow him on Twitter at @ca_london.
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Never turn your back on the Cahills . . . The most powerful family history has ever known returns with a vengeance in The 39 Clues: Doublecross! The Cahills are the world's most powerful family, but their strength is being tested. A sinister man callin... SEE MORE