Over 300 Tips, Tricks, Hints, and Hacks for OS X Lion
After they've learned the basics in Lion, Mac users will master everyday tools such as the Dock, Spotlight, Mission Control, Launchpad, and Dashboard. They'll discover other amazingly useful tools and built-in add-ons that they never knew existed.
Reviews with the most likes.
Even if the author claims that the tips and tricks he shares in the book are really neat and that most people don't know them, I wouldn't really go that far. I was already familiar with 95% of the things he mentions in this book. Most, if not all of them, could be easily found on Apple-dedicated websites or in magazines. Nonetheless, it's nice to have some of them compiled in one place.