Quotes from book
The Medusa Plot
The Medusa Plot is the first book in the Cahills vs. Vespers series. The book was written by Gordon Korman and released on August 30, 2011. The story picks up two years after the original series The 39 Clues and is about the Cahills' attempt to save members of their family that have been kidnapped by following the instructions given by Vesper One.

“Don't think of it as losing a boyfriend. Think of it as gaining a stalker."
-Dan Cahill”
Source: The Medusa Plot