This is for a vintage sleaze paperback, titled "Sin Resort," by Alan Marshall (but actually written by Nedra Westlake, wife of Don Westlake). Cover art by Harold W. McCauley. 1961, Nightstand. Book has vertical downward curving near the spine, and a slight upward curve at the vertical outside page edges, making for a slight "S" if you look at the page foredges. Light fading to pink in spots on back cover. Pages have very slight toning and are supple.