The Really Cool Adventures of Captain Underpants (lost self-published Captain Underpants prototype novel; 1989) - The Lost Media Wiki

Northeast Ohio Regional Library System

Help find the 1989 captain underpants novel by dav pilkey : r/ CaptainUnderpants

IT, International Times

The really cool adventures of Captian Underpants

wordlists/dictionaries/english_top10k_from_google.txt at master · xajkep/wordlists · GitHub

Captain Underpants - Wikipedia

Books: Turing test

What are the best dark, gritty, or off-kilter superhero-centric graphic novels? - Quora

The Adventures of Captain Underpants, Dog Man Wiki

Books: Internet Archive