The 39 Clues: Cahills vs. Vespers Book 1: The Medusa Plot - Library Edition

The Medusa Plot - Gordon Korman The first book in the 'Cahills vs Vespers' series, a spinoff of the '39 Clues' series. Very fast-paced and gripping right from the beginning, and ending with a cliffhanger! Compared to the '39 Clues' series, the details of execution in this story are (more) bare bones, but the plot works. Don't be too analytical and just read on.