I love the Captain Underpants series, but this one was really good but it really wasn't about Tippy. It was really about George and Harold when they were in Kindergarten. And it also explains that time machines are SUPER dangerous. But at the end Tippy may have died, (but it said there was another final Captain Underpants book with him,) but in that part there was some blood and gore. And Dav Pilkey kept saying he was going to make the book, but he canceled it like three times. The only drug in it is in one of George and Harold's comics they just have wine.