In their second trip through the enchanted library, Cleo and Evan find themselves in a spy story, where they must stop a traitor named Viper--and they find themselves working with the mysterious replacement librarian, Ms. Crowley., In their second trip through the enchanted library, the new key lands Cleo and Evan in the middle of a spy story, where their impossible mission is to stop a traitor who calls himself Viper--and they find themselves working with the replacement librarian, Ms. Crowley, whose exact role in their adventures is becoming increasingly mysterious., Agents Cleo and Evan have been given an impossible mission to become super-spies, foil the plans of an evil mastermind by breaking into his secret underwater lair, find the right key to unlock the place where a collection of dangerous books is locked up tight, complete a daring rescue of the friend who has vanished into the pages of one of those books and get out alive! Simultaneous and eBook.