Library Book prop from the movie

I own the book called "A pictorial History of Magic & the Supernatural" along with the little "rune note" that was used in the library scene, When Laura Parker & Loretta Swit went into the library to research the runes on the little note that was left on the busted window of the back of the motorhome. My brother's friend was part of the film crew. He aquired the book, and got the cast to sign the inside cover. So it has all 4 signatures, Peter Fonda, Warren Oates, Laura Parker and Loretta Swit. My brother aquired the book & rune from his friend in the early 80s, then ended up giving them to me cause he knew I always wanted them so badly. Something I will treasure always. :)