I already read it some time back. It doesn't explain everything. There are some advanced processes that are only taught at the workshops.
I don't recall exactly, but there are some 30-60 other processes not covered in the book. The book only covers 2 of them. Joe Vitale had to sign a form (as so do all workshop participants) to never disclose any of the other training materials, and to never teach others.
I understand why. Because this is about 100% responsibilty for all one thinks, feels and sees. There is no outer world. All is within. If one sees anything that is remotely stressful, then one only needs to work on oneself. Changing the 'I' changes everything else. After all, all is projection. If one is able to look in the mirror and see nothing, then the work is done. Maybe take several life times, maybe not. But I am up for the challenge.