A guide to being evil in accordance with the style of Dr. Doofenshmirtz counsels readers on everything from selecting a nemesis to getting over evil inventor's block, in a storybook complemented by Doof back stories and comic inserts.

Enter the zany world of Dr. Doofenshmirtz as he reveals his crazy plots, wacky ideas, and outrageous inventions! Fans will love learning how the doctor built the hot dog revenge-inator, opened up a school for budding evil scientists, and much more!

Phineas and Ferb have come up with yet another great idea for a summer day—they are going to create a stunt school and teach all their friends how to be top stuntmen and women! Meanwhile, Perry the Platypus enters his secret lair to discover that the evil Dr. Doofenshmirtz has taken over the spy agency.

Phineas and Ferb fans will love this cool format based on the sure-to-be hit Phineas and Ferb Disney Channel Original Movie: Across the 2nd Dimension! By flipping the sturdy die-cut pages, kids will be able to interchange elements of Phineas, Ferb, and the rest of their favorite characters, who have entered an alternate world! With over two hundred different character combinations to be made, this book will provide hours of phun!

Want to know the best ways to thwart an evil doctor's plans? Or how to go undercover to combat crime, while still making it home in time for dinner? Find out in this jam-packed guide to fighting evil from everyone's favorite platypus, Perry! From top-secret spy tips and fill-in activities, to diagrams of some of Agent P's most elaborate plans, to spy-riffic jokes, to unfinished comic panels for readers to get creative, this hardcover format is sure to be a hit with spies-in-training everywhere! Plus, this format also includes two full-color inserts.

Candace has always known that her brothers are a little weird, especially Ferb, who never seems to talk. But after watching an all-night science-fiction movie marathon, she's convinced that Ferb is actually an alien! Can Candace prove her brother is really from another planet? Featuring exciting full-color art from the show, this World of Reading: Level 3 Phineas and Ferb early reader is perfect for fans who are ready to read on their own.

Discrete Mathematics with Ducks, Second Edition is a gentle introduction for students who find the proofs and abstractions of mathematics challenging. At the same time, it provides stimulating material that instructors can use for more advanced students. The first edition was widely well received, with its whimsical writing style and numerous exercises and materials that engaged students at all levels. The new, expanded edition continues to facilitate effective and active learning. It is designed to help students learn about discrete mathematics through problem-based activities. These are created to inspire students to understand mathematics by actively practicing and doing, which helps students better retain what they’ve learned. As such, each chapter contains a mixture of discovery-based activities, projects, expository text, in-class exercises, and homework problems. The author’s lively and friendly writing style is appealing to both instructors and students alike and encourages readers to learn. The book’s light-hearted approach to the subject is a guiding principle and helps students learn mathematical abstraction. Features: The book’s Try This! sections encourage students to construct components of discussed concepts, theorems, and proofs Provided sets of discovery problems and illustrative examples reinforce learning Bonus sections can be used by instructors as part of their regular curriculum, for projects, or for further study