What If? 10th Anniversary Edition cover

What If? 10th Anniversary Edition

What If? • Book 1

by Randall Munroe

4.14 Goodreads
(197.2K ratings)

Why You'll Love This

Randall Munroe answers questions no one should bother answering — with actual physics, actual math, and actual consequences that will make you laugh out loud.

  • Great if you want: science that's rigorous and absurd in equal measure
  • The experience: breezy and episodic — perfect for reading in short bursts
  • The writing: Munroe's deadpan precision turns catastrophic scenarios into dry comedy
  • Skip if: you want narrative — this is essays, not a book you follow

About This Book

What happens when you take the most absurd hypothetical questions imaginable — a baseball pitched at 90% the speed of light, a mole of moles, a robot apocalypse — and answer them with genuine scientific rigor? You get a book that somehow makes radiation physics and fluid dynamics feel like the funniest things you've ever encountered. Randall Munroe, creator of the webcomic xkcd, has built a reputation for treating ridiculous premises with complete seriousness, and that commitment is exactly what gives this collection its strange, addictive power. The stakes aren't emotional in any conventional sense — nobody's heart breaks here — but there's something genuinely thrilling about watching careful thinking collide with spectacular chaos.

What makes reading this so satisfying is Munroe's voice: dry, precise, and deadpan in a way that earns its laughs through accuracy rather than exaggeration. His stick-figure illustrations aren't decoration — they're part of the argument, clarifying concepts that prose alone would struggle to land. The book moves between questions at a brisk pace, each self-contained enough to dip into anywhere, yet the cumulative effect is surprisingly coherent. This anniversary edition is a reminder that good science writing doesn't have to choose between being correct and being delightful.