4 Heroes of Olympus Books - Rick Riordan

4 Heroes of Olympus Books - Rick Riordan "The Lost Hero" "The Son of Neptune" "The House of Hades" "The Blood of Olympus" Hardcover books with dustcovers. The dustcovers have some edge curling. The "Son of Neptune" has an inscription on the front page. (see photo) Otherwise, these preowned books are in great condition. excellent condition! all hardback, only flaw is that some of the corners of pages are folded (dogeared) based on quotes that i liked.