In the strip from April 9, 1971 Snoopy can be seen reading a part of one the books, which reads, "And so the six Bunny-Wunnies said good night, and went to sleep. Their adventure was over, and all had ended well".
The books are enjoyed by other Peanuts characters, too. In the strip from October 23, 1972, one of the books, The Six Bunny Wunnies Freak Out, is banned from the school library, causing Linus, Sally and Charlie Brown to become upset. Linus leads a campaign to lift the ban. In the strip from November 1, 1972, he states that the decision to ban the book was not made by the librarian or the principal but by the school board, one of the members of which is Charlie Brown's doctor. At Linus' insistence, Charlie Brown speaks to his doctor about the ban, although whether or not the ban is lifted is unclear.
The Sunday strip with the first reference to the Bunny Wunny book series was later featured in an episode of The Charlie Brown and Snoopy Show on October 29, 1983, after Snoopy arrives home from a school dance that he attended with Peppermint Patty.
Known books in the series
- The Six Bunny Wunnies and Their Pony Cart (First mentioned July 26, 1970)
- The Six Bunny Wunnies Go to Long Beach (First mentioned April 8, 1971)
- The Six Bunny Wunnies Make Cookies (First mentioned April 8, 1971)
- The Six Bunny Wunnies Join an Encounter Group (First mentioned April 8, 1971)
- The Six Bunny Wunnies and Their XK-E (First mentioned April 10, 1971)
- The Six Bunny Wunnies and Their Water Bed (First mentioned April 12, 1971)
- The Six Bunny Wunnies and Their Layover in Anderson, Indiana (First mentioned April 13, 1971)
- The Six Bunny Wunnies and the Female Veterinarian (First mentioned February 10, 1972)
- The Six Bunny Wunnies Freak Out (First mentioned October 23, 1972)
- The Six Bunny Wunnies Visit Plains, Georgia (First mentioned September 26, 1977)