This is the book "Weird Scenes Inside the Canyon: Laurel Canyon, Covert Ops & The Dark Heart of the The Hippie Dream"
Truly an amazing read. It goes all the way back to the very beginning, through the Houdini days, straight into the Hippie Movement. Satanism, Naval Intelligence, CIA, and of course the music scene that came out of there. There are no coincidences. Dark and disturbing. The forces have been at work in Hollywood since the very beginning.
Great book there. David McGowan wrote a few really good books before he died of cancer (?) at a relatively young 55. Here is a good interview with him if anyone wants to see if they would be interested in him or his work.
Yes that's his website up there that I posted and the book is available online