All the captain underpants books in order

Book 1: The Adventures of Captain Underpants (1997)

Book 2: Captain Underpants and the Attack of the Talking Toilets (1999)

Book 3: Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space (and the Subsequent Assault of the Equally Evil Lunchroom Zombie Nerds) (1999)

Book 4: Captain Underpants and the Perilous Plot of Professor Poopypants (2000)

Book 5: Captain Underpants and the Wrath of the Wicked Wedgie Woman (2001)

Book 6: Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy Part 1: The Night of the Nasty Nostril Nuggets (2003)

Book 7: Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy Part 2: The Revenge of the Ridiculous Robo-Boogers (2003)

Book 8: Captain Underpants and the Preposterous Plight of the Purple Potty People (2006)

Book 9: Captain Underpants and the Terrifying Return of Tippy Tinkletrousers (2012)

Book 10: Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers (2013)

Book 11: Captain Underpants and the Tyrannical Retaliation of the Turbo Toilet 2000 (2014)

Book 12: Captain Underpants and the Sensational Saga of Sir Stinks-a-Lot (2015)