In this thrilling adventure, two friends are trapped in a spy novel where they must take on an evil villain and his henchmen in his underwater lair. Cleo and Evan have a secret. A collection of books so dangerous they are locked up tight. A friend has vanished inside the pages of one of them. It's up to them to find the key that will set her free. A SPY MUST BE READY FOR ANYTHING! Agents Cleo and Evan have been given an impossible mission: become super-spies and foil the plans of an evil mastermind. But it won't be easy to break into the Viper's secret underwater lair, complete a daring rescue, find the right key, and get out alive! Praise for Key Hunters "Luper's delectable humor is appropriate for the intended age group, and the plot will keep readers' attention to the end . . . [t]his is a satisfying read for beginning independent readers." — School Library Journal