The Medusa Plot is the first book in the Cahills Vs Vespers series of the popular The 39 Clues franchise. Written by Gordon Korman and published by Scholastic US in 2011, this hardcover activity book with 224 pages is in like-new condition.

The book features an unabridged narrative type of fiction, with an intended audience ranging from young adults to adults, with ages 4-8 and 9-12 also included. Its genre is children and young adults, with a topic of teen adventure.