There really is no preparing to start the Whole30 Challenge. You just need to jump in with both feet and go for it. Like I said earlier, I wasn't sure I would even be able to complete it. But here I am on day 18.
The book is called It Starts With Food. I didn't even get the book until I was on day 7. That's just how I roll. Basically, the idea is to detox your body. To get back to the basics of good food and to find out what food triggers unhealthy reactions in your body.
For me, I was overwhelmed with sugar cravings and grain/BREAD cravings. Seriously, I wanted sugar ALL THE TIME!! Of course, it was even better with some sort of bready thing.