Have you ever wondered at what point in history there were too many English-language books to read in one lifetime? Or what would happen to the Earth if the Sun didn't exist? Munroe has your answers. A former NASA roboticist, the author launched the weblog xkcd.com, which purposely has no phonetic pronunciation, in 2005. The blog's blend of math and science, sarcasm, and stick-figure drawings has gained a loyal following. (His etching of someone who reads a book on juggling, tries to juggle, fails, and immediately trashes the book is especially poignant.) In 2012, Munroe started answering reader-submitted hypotheticals using Internet research along with his own knowledge. That series, "What If," is the focus of this witty nonfiction debut, which features a plethora of new black-and-white cartoons. VERDICT Those who enjoyed the irreverent style of Allie Brosh's best-selling memoir, Hyperbole and a Half, will enjoy Munroe's serious and silly musings on everything from science to romance. One question submitted to his blog: "If all digital data were stored on punch cards, how big would Google's data warehouse be?" was even answered by the search-engine behemoth. The response, "No comment."-Stephanie Sendaula, Library Journal (c) Copyright 2014. Library Journals LLC, a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.