Percy and Annabeth want to help complete the prophecy of the Seven, but they have been trapped in Tartarus by a giant spider. They drink the fire of life to survive and fight their way through the pits of monsters. Then they find out that unless they get help, they are never going to finish the prophecy!
My opinion of this book was that it was overall really good and kept you thinking about what would happen next. I was a little disappointed that they didn’t have more of an adventure in Tartarus, but I would definitely recommend this to people who like adventure books and Percy Jackson. Also, I liked how Rick Riordan changed his style of writing slightly to capture how the Underworld is different from the real world.