Actually it is already out.
It was released in major bookstores like BN or Target.
It was released October 2nd, 2012 and is called "The Mark Of Athena."
I have already read it and refuse to spoil anything.
in October 2012
it has already come out it is called The Mark of Athenabook 4 is called The House of Hades and is coming out Oct 2013book 5 is unnamed but it is supposed to be the final book in the Heroes of Olympus series and is coming out in Autumn 2014
The mark of Athena
the exact date is unknown, but sometime in fall 2012. its called the mark of athena.
The third book in The Heroes of Olympus series by Rick Riordan has not yet been released. It is titled The Mark of Athenaand is scheduled to be released Fall 2012.
The first book was released on 12th October 2010.
The next (third) book in the Heroes of Olympus series is to be titled The Mark of Athena, which is scheduled to be released in fall of 2012.The third book will be called "The Mark of Athena" (as seen on Rick Riordan's website).
Rick Riordan said it depends on how he and his fans feel after the rest of the books in this series. I hope there's another, so jazz up fans!Oh, and if you want to read the next book I'm creating a .5 to his next one but, I have no clue when it's going to be done. I think I'll put it on google so search for heroes of olympus book 3.
Yes that's what the heroes of Olympus is about 3 half bloods they go to camp half blood
1. The Lost Hero 2. The Son of Neptune 3. The mark of Athena 4. Has not come out yet but i heard it will be called The House of Hades
1 the lost hero 2 the son of neptune 3 the mark of athena not yet written number 5 the house of hades
1. Percy Jackson and the Lightning Theif. 2. Percy Jackson and the Sea of Monsters. 3. Percy Jackson and the Titan's Curse. 4. Percy Jackson and the Battle of the Labyrinth. 5. Percy Jackson and the Last Olympian. After this, the series ends and a new one begins, which is Heroes of Olympus. It still involves Percy Jackson and his friends, but there are a bunch of new characters and it involves a fair bit of Roman mythology aswell. It follows a new story line, with a whole new threat. (No longer is Kronos the threat.) There are two out in the Heroes of Olympus series as far as I know: 1. Heroes of Olympus: the Lost Hero. 2. Heroes of Olympus: the Son of Neptune. Hope that helped!