I know what you are thinking. But Group Theory In The Bedroom is about nothing more risqué than the mathematics of group theory applied to flipping a mattress. Brian Hayes book is a collection of previously written articles and afterthoughts all of which articles concern topics in mathematics or computing. I enjoyed some them, but found others uninteresting; I found the collection uneven. Chapters I enjoyed were about clocks, the genetic code, mathematics and gearing, and ternary computing. There were several moments where the math challenged me, but overall it was a pretty good read.