Just as the name states, it's a quick start guide to the Autoimmune Protocol (AIP). If you don't know what AIP is, it is guide to elimination and reintroduction of foods that may be triggering your autoimmune disease.
I listen to her podcasts all the time. It took me some time to get past how she sounds like bubble head...too up beat for me I guess. She is, however a very smart woman. She gives practical advice on nutrition and fitness.
Probably my second favorite. Home of Mark Sisson's famous The Primal Blueprint, a diet/lifestyle blueprint. A back to basics nutrition and exercise philosophy. No processed foods and no killing yourself at the gym. You'll also find practical information on the Ketogenic Diet.