Houghton Mifflin Harcourt has announced the Sept. 2 release of Randall Munroe's What If?: Serious Answers to Absurd Hypothetical Questions, based on the popular blog by the xkcd cartoonist.

Launched in July 2012, the blog features Munroe, a former NASA roboticist, answering hypothetical physics- or math-related questions -- for instance, "How much Force power can Yoda output?" or "What if there was a robot apocalypse?" -- with the help of infographics and the cartoonist's signature stick figures. The book will include a blend of new questions and answers and old favorites.

"As I’ve sifted through the letters submitted to What If every week, I’ve occasionally set aside particularly neat questions that I wanted to spend a little more time on," Munroe explained this morning. "This book features my answers to those questions, along with revised and updated versions of some of my favorite articles from the site. (I’m also including my personal list of the weirdest questions people have submitted.)"

The 320-page hardcover is available for preorder.