Scary Stories for Sleep-overs is a series of scary children's books written by R.C. Welch, Q.L. Pearce, and various other authors and illustrated by Ricardo Delgado, Bartt Warbuton, Dwight Been and others throughout the series. The series was enormously popular, publishing millions of copies and ten initial volumes between the years of 1991 and 1999. The series even produced several one-shot novels and a spin-off series, Scary Mysteries for Sleep-overs. Reaching its peak popularity in the mid-1990s, this was Price Stern Sloan's answer to Scary Stories to Tell in the Dark.