The Candy Shop War by Brandon Mull

The Candy Shop War by Brandon Mull follows the adventures of three friends, Nate, Summer, Pigeon and Trevor as they become aquainted with Mrs. White, the proprietor of The Sweet Tooth Ice Cream and Candy Shop, a new candy story in town. At first thinking that she is a sweet but otherwise unremarkable motherly middle aged lady they quickly discover that she has special candy. Candy that has magical properties.

It's pretty great to be able to pop a candy into your mouth, and then bounce around like you're on the moon, right? But Mrs. White doesn't just want to share her magical candy with the kids. When she starts asking them to do illegal things for her, the kids balk. And that's when Mrs. White shows her... not so sweet side. Can the kids avoid her wrath? And along with that, will they be able to help John Dart and Mr. Stott keep her from her ultimate goal...of taking over the world? Read the book and find out! The Candy Shop War was first published in 2007.