I purchased my first Captain Underpants a week ago for my 6yo 1st grader who is reading well for his age. He loved it and begged my to buy the other books in the series. He took it to show and tell at school, reads them at night rather than watch cartoons, and has gotten his cousin into them as well. The humor is directed perfectly to young boys and will get them hooked on the joys of reading. I highly recommend these books, especially for reluctant readers.