Download or read book Captain Underpants (Books 1-12) Slipcase written by Dav Pilkey and published by . This book was released on 2017-09 with total page 2256 pages. Available in PDF, EPUB and Kindle. Book excerpt: It's got TWELVE times the action! TWELVE times the adventure! TWELVE times the Flip-O-Rama! Now you can have all TWELVE Captain Underpants books in one boxed set! Tra-La-Laaaaa! Prepare for laffs, action and flip your lid for Flip-o-Rama in this preposterous Undies extravaganza!