It begins with the dreams. Cassie has been having strange nightmares of a voice calling to her from deep beneath the ocean.

They're unsettling, but it isn't until Cassie discovers Tobias has been having dreams too--the exact same dreams, of a voice pleading for help--that she decides it's time to start listening.

When pieces of debris wash up on shore, marked with alien writing, the team realizes they may still have allies in the fight for Earth--allies who are trying to make contact. Now they just have to reach them, before time runs out.

CHRIS GRINE is the creator of the Eisner Award-nominated Chickenhare and Time Shifters. He's been making up stories since he was a kid, and not just to get out of trouble with his parents. Nowadays, Chris spends most of his time writing and illustrating books, drinking lots of coffee, and sleeping as little as possible. He spends his free time with his wife, playing with his kids, watching movies, and collecting action figures (but only the bad guys).

K.A. APPLEGATE is the author of the bestselling Animorphs series, as well as the Remnants and Everworld series, Home of the Brave, and the Roscoe Riley Rules series. She lives in Tiburon, California.