Nice review! If I were to guess, the Church of Scientology is either attempting to improve public feeling for Hubbard or hope that reading / reviewing his book will cause people to get into scientology.

Maybe. I have seen this TV commercial about him a few times: http://youtu.be/_VaMOa5Hh7E#aid=P-1HdNu_wfs

That sounds really different. It's very doubtful that I will read it, so no problem about the spoilers. :)