Although this book was sad it was one of the best books I have read. I would sit all day and read it until dinner or bed time. I would recommend this book to anyone. My 4thgrade teacher recommended it to me and I said no but then I started reading it over the summer I and I loved the book.
This is the most amazing series I have read next to Harry Potter and the Percy Jackson series. I mostly enjoyed the Lost Hero but this was also a really good one, the part I hated was when Annabeth and Percy fall into Tartarus. But the crew goes on.