no particular date yet but it guarentees Fall 2011 the title will be the Son of Neptune refering to Percy Jackson at the Roman camp
The second Heroes of Olympus book, The Son of Neptune, is coming out October 4, 2011.
Since the Percy Jackson books weren't out in Singapore, the Heroes of Olympus probably won't be out in Singapore.
The new series, The Heroes Of Olympus, Is scheduled for release on October 12, 2010.
It comes out in spring 2011:]
It probably can out there in fall 2011.
House of Hades is coming out in Autumn, probably October
it is coming out this fall of 2011
"The House of Hades" is the fourth book in the Heroes of Olympus series by Rick Riordan and it was released on October 8, 2013.
You can research Heroes of Olympus by going to Google.com and typing in, "Heroes of Olympus".
In the fall of 2011, - specifically the 4th of October. :-)
Blood Of Olympus is the name of the 5th and rumored final book to the series of "The Heroes Of Olympus"
The Heroes of Olympus