The "Goldilocks" book that Mouse has been looking for comes from the very first story in the "If You Give a Mouse a Cookie" series - "Applesauce."
In "Quest for the Cup," Oliver and Mouse go on a 'quest,' inviting their friends to join along the way. Questing was introduced to the public through the very well-known stories of 'The Knights of the Round Table.'
"Goodnight Mouse" allows us to revisit not only all of the characters, but their contributions to the series.
The night routines of all of the characters in "Goodnight Mouse" are very reflective of the characters themselves.
The Lisa Loeb song "Goodnight Mouse" is the only song in the series that is sung by Loeb herself, as opposed to being sung by the characters.