Any book that starts talking about juice cleanses and gimmicky fitness devices belongs squarely in your trashcan. If you want a straightforward, no-nonsense approach to refining your body, check out Man 2.0 Engineering the Alpha. The book simply puts forth a 4-week diet and exercise program that will start the slimming of that double IPA gut. Based on the idea of natural hormone optimization (it’s science), the book claims that within a week it can help improve your brain function, boost you energy, and increase your sex drive . . . no problem there, am I right? High five! The best part is, it’s not as stuffy as 99% of the health books at your local Barnes & Noble.