This book is pretty light weight. The font is big, and there is lots of “chrome” on the pages, which conspire to make a book which would probably be only 100 pages in a normal font more like 200 pages. The book also suffers from trying a little too hard to be funny, with numerous interruptions for the authors to tell you how terribly clever they are. Its annoying quite quickly. The answers also aren’t as detailed and believable as those found to similar questions in “Why don’t penguin’s feet freeze? (and 114 other questions)“, the New Scientist book I just finished reading. I’d say go with the New Scientist book if you’re buying something, but read this if you’re given it.