Download or read book What If? written by Randall Munroe and published by Houghton Mifflin Harcourt. This book was released on 2014 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: The creator of the incredibly popular webcomic xkcd presents his heavily researched answers to his fans' oddest questions, including “What if I took a swim in a spent-nuclear-fuel pool?” and “Could you build a jetpack using downward-firing machine guns?” 100,000 first printing.