His books were recommended to me by I think Mr. Shakita (does anyone remember him?). As mP says, the "Who" book explains some of the missing pieces you always wondered about...things that never made sense. I have the "Hidden Face" book as well, but I don't think I finished it. I believe I got about 1/4 into it and I was done. God was over for me.
These books were pivotal to me in my journey.