It's Your Call: Phineas and Ferb: Secret Agent Showdown
It's Your Call: Phineas and Ferb: Secret Agent Showdown is a part of the It's Your Call collection.
Phineas and Ferb: It's Your Call: Secret Agent Showdown lets readers choose the action of the story! Agent P and his entire undercover team must go on a mission to defeat the evil Dr. Doofenshmirtz in this exciting eBook 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!