This is for a copy of The Sinful Ones, a Nightstand Book. Author is listed as Don Elliott, which in this case is a pseduonym for Robert Silverberg who actually wrote this.  Cover art by Harold W. McCauley. 1961. NB 1564.  Book is slightly cocked. Some fading to the pink on the back cover. Upper outside corners bow downwards (might flatten over time). Edge and corner wear to covers. Pages are a little toned and supple. Binding is good, but care should be taken when handling to ensure the continued integrity of the glue which is over 50 years old.