60 Mountain Lion Tips: A MacSparky Field Guide

I'm rating this based on the quality of the writing, but not it's applicability to me. This is a handy little guidebook that'll teach you some OS X tricks that maybe you didn't know. I found one or two in here that I had never heard of and found useful. However, if you're a nerd like me and on your Mac all day long, you probably won't get a ton out of this.