<Li> The Complete Captain Underpants Collection (Books 1--8; 1997--2006) </Li> <Li> The Captain Underpants Collectors' Edition Collection (Books 1--3 + 3 CD - Roms; 1997--1999, 2005--2008) </Li> <Ul> <Li> The Adventures of Captain Underpants (2013) </Li> <Li> Captain Underpants and the Attack of the Talking Toilets (2014) </Li> <Li> 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) (2014) </Li> <Li> Captain Underpants and the Perilous Plot of Professor Poopypants (2015) </Li> <Li> Captain Underpants and the Wrath of the Wicked Wedgie Woman (2017) </Li> </Ul> <Li> The Adventures of Captain Underpants (2013) </Li>

How many captain underpants books are in full color
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