The book "The Ultimate Evil" signed on the first inside page by David Berkowitz and Charles Manson. Berkowitz added "N.Y.C. SON of SAM 77", which refers to the time and place he was constantly in the media. Manson added "easy" with a swastika through his signature. The signatures were obtained by a gentleman who was at one time associated with the Manson family. Charles Manson's signature was obtained at the Corcoran State Prison, Berkowitz was obtained at the Sullivan County Correctional Facility. The book links a number of satanic cults, including the Manson family and the Son Of Sam cult. This is a 1987 first edition. The book is in overall very good shape. The dust jacket has some rips along the top and bottom. The pages have some stains along the top edges.