DAVE ASPREY, founder of the Bulletproof Executive blog, is a Silicon Valley investor and technology entrepreneur who spent fifteen years and over $300,000 learning to hack his own biology. Dave lost one hundred pounds without counting calories or doing excessive exercise; upgraded his IQ by more than twenty points; and lowered his biological age--all the while learning to sleep better in less time. Mastering these seemingly impossible things transformed him into a better entrepreneur, a better husband and a better father. Dave's blog reaches 1.5 million unique monthly visitors, and his #1 ranked podcast has been downloaded 5 million times.