I highly recommend that you read the book.
Also, there is some info about coming off the diet at the following site:
I, too, am on Day 5 and it has been the roughout day yet. I REALLY wanted to eat this afternoon - even had a plate of raw veggies in from of me. But, alas, I resisted. Did an enema, went for a 3 mile walk, and now will take a lovely bath. It was oh so close though.......
How long are you intending to fast?