It's Your Call: Secret Agent Showdown

 is a 128-page interactive book with more than 10 posssible endings.

Background Information
The book will be released on October 8, 2013.

Title Description
Phineas and Ferb: It's Your Call: Secret Agent Showdown lets readers choose the action and outcome of the story! Agent P and his entire undercover team must go on a mission to defeat the evil Dr. Doofenshmirtz in this 128-page adventure. Featuring black-and-white art from the show and more than 10 possible endings, it's up to readers to decide how the story turns out!