If you are interested in the history of Ozzy Osbourne, Rainbow, or the "Blizzard of Ozz" band, the book is highly recommended by rock historians. It is best obtained through legitimate book retailers or second-hand markets to support the author's estate and legacy.
Without access to the specific PDF you're referring to, here are some potential topics that might be included in a document titled "Bob Daisley for Facts Sake": bob daisley for facts sake pdf top