The Primal Blueprint by Mark Sisson is also great and changed my life. Reading 'Good Calories Bad Calories' now from Gary Taubes (the author of the op) and it is awesome too.
After a lifetime of thinking that diets had to be permanent and results were only possible through hours of exercise this book turned me around. I lost 50 lbs in eight months and haven't looked back.
On Good Calories, Bad Calories, I was convinced by the critique of the mainstream but not by his alternative proposal.
Did you catch Leo Laporte / Steve Gibson (ala Security Now) covering LCHF diets a few weeks ago?