just go to the iTunes store and search Percy Jackson and the Olympians the lightning thief and it should pop up but make sure it says movie instead of book
you can buy it on itunes and on dish pay per view
'Percy Jackson & The Olympians: The Lightning Thief ' has a release date of June 29, 2010 .
amazon
You can watch Percy Jackson movies at the cinema if there are old movies showing or you can buy or rent a copy of The Lightning Thief.
Maybe it will come out march or April.
ebay
No, you can't buy it yet; the expected release date is March 15, 2013. You will have to wait a few more months.
You should probably just watch or buy the movie but then you could always go to YouTube or somewhere else and watch the trailer.
You can get Percy Jackson books at most bookstores, depending on your location. You can also buy them online. (see related links)
Barnes and Noble
It depends where you buy it from
almost anywhere