This series is what finally sparked my son's interest in reading. After he discovered one of these books at his school's library, he brought it home and read it in one sitting. He then wanted to read more, but the library only had one more from the series. I bought him the boxed set for Christmas and he was thrilled. He sat and read them right away, and has since re-read them many times over. Since finishing the box set he has really gained an interest in this author's work and is now reading the Captain Underpants series. If you have a reluctant reader, I'd certainly advise you to give these a try!