"Good Caloires/Bad Calories"(Gary Taubes) is the best science geek out.
"Why we get fat" is supposedly the easy version of GC/BC.
I haven't read it, but the original Atkins books from the late 1970's are probably very interesting from a historical perspective.
Pay no attention to who has which college degree. I've known some pretty dumb PhD's and some pretty smart people with no college degree at all. Taubes is as smart as they come.
5'0" female, 44 years old. Started Primal October 31, 2011, at a skinny fat 111.5 lbs. Low weight: 99.5 lb on a fast. Gained back to 115(!) on SAD chocolate, potato chips, and stress. Currently keeping food tracker.
I (try to) follow by-the-book primal as advocated by Mark Sisson, except for whey powder and a bit of cream. I advocate a two-month strict adjustment for newbies. But everybody is different and should tweak Primal to their own needs.