Riordan Rick: House of Hades (Heroes of Olympus #4)
House of Hades (Heroes of Olympus #4) - Rick Riordan. The House of Hades is the fourth book in the bestselling Heroes of Olympus series, set in the action-packed world of Percy Jackson. The stakes have never been higher. If Percy Jackson and Annabeth fail in their quest, there'll be hell on Earth. Literally. ...a dál?