pb?Paperback. Typically 7" by 4.25" (18 cm by 11 cm) or smaller, though trimming errors can cause them to sometimes be slightly (less than 1/4 extra inch) taller or wider/deeper.
3rd printing (per number line) of 1989 Tor edition.
Back cover (seen on Amazon) has a close-up of 1 of the hands from the front cover followed by quotes from Alfred Hitchcock, Bestsellers, and Peter Straub, a plot description, and the credits of the 1998 Gus Van Sant-directed Psycho remake.