Parents Day is one of Hey Arnold! chapter books based on the episode with the same title. It was written by Craig Bartlett and Maggie Groening, based on a screenplay by Michelle Lamoreaux and Joseph Purdy, illustrated by Tim Parsons, with cover by Tuck Tucker, and Teale Wang.
Novelization of the episode. No major changes. This is as good a time as any to mention that Tim Parsons' illustrations in these are beautiful. They're based on the late-season character designs, but they're very sketchy, so they look stiff the way the late-season animation does.