One Day at HorrorLand is the sixteenth book in Goosebumps, the series of children's horror fiction novels created and authored by R. L. Stine. It was adapted into a two-part episode for the television series, which was later released on VHS and DVD. A comic adaptation of the book was included in the graphic novel compilation Terror Trips, part of the Goosebumps Graphix series. There were two video games based on the book. The HorrorLand theme park was expanded upon in the book series Goosebumps HorrorLand.