Here's a bit from the book description:
This elegant, accessible guide steers readers through the process of designing and constructing simple pop-ups, no matter what their skill level. Filled with sixteen do-it-yourself models, helpful illustrations, and clear, step-by-step instructions, "The Pocket Paper Engineer" provides playful cards that can be detached, cut, and assembled right out of the book, then stored in pocket pages inside. Each card demonstrates a fundamental principle of how to design and construct easy cut-and-fold pop-up forms. Instructions for creating pop-ups from scratch are also included, along with suggestions for illustrations and recommendations for tools, paper, and adhesives.
Sounds pretty good, doesn't it?
Here's a link to the book The Pocket Paper Engineer, Volume I: Basic Forms: How to Make Pop-Ups Step-by-Step
Oh...and there's more of the same goodness in Volume 2: The Pocket Paper Engineer, Volume 2: Platforms and Props: How to Make Pop-Ups Step-by-Step.