For those who haven't read the Percy Jackson series, you really should. The House of Hades is part of a spin off series and is the fourth book. In this book we once again join the seven as they continue their journey. I am super excited about this book as are many of the other PoJ fans. You can buy it now since it recently came out. If you haven't read the other books than go read them now before you even consider this book. The author, Rick Riordan, also wrote: The Kane Chronicles, The Demigod Files, The Demigod Diaries, The Maze of Bones, Big Red Tequila, Survival Guide( The Kane Chronicles), and a few more. There are rumors that Riordan is going to be writing a Norse God series. If you need an opinion about how amazing this author is, or how you should read House of Hades you can ask Izzi Loosle, Marcia Orellana, Kelly Correa, and a few others. The books are so good! once you pick them up its so difficult to put them back down!