It's Only a Nightmare! was the thirty-second book in the Give Yourself Goosebumps gamebook series. It was preceded by The Werewolf of Twisted Tree Lodge and followed by It Came from the Internet. The image on the cover had a bed with gargoyle-like figures on the bedposts in front of a window with lightning flashing outside. A strange blue creature with the words "Sleep Master" embroidered on its night cap was in the bed under the quilt. The creature's left hand was slightly transparent, yet was still gripping the quilt. It was released in December 1998 and was 137 pages long.