Captain Underpants and the Perilous Plot of Professor Poopypants/The Adventures of Captain Underpants (2 in 1) Condition: Decent; wrinkled likely due to spillage $2.50 1 in stock + - Add to cart Description Description ISBN: 978-1-338-19205-6. Date published: 2000. Author: Dav Pilkey. Related products The Tail of Emily Windsnap $2.50 Condition: Very Good Add to cart Athena the Brain (Goddess Girls #1) $2.50 Condition: Like New Add to cart Eleven $2.50 Condition: Very Good Add to cart