It is called The Last Olympian it came out on 5.5.09
Book 5: Percy Jackson and the Olympians: The Last Olympian
The Last Olympian
His first name is Perseus (like in the myth of Perseus, Percy is short for Perseus) and his last name is Jackson (since his mother is Sally Jackson and Poseidon doesn't have a last name). His middle name has not been mentioned. Perseus Jackson
Sally Jackson is the name of Percy's mom.
Annabeth's last name in the series of Percy Jackson and the Olympians is Chase.
There is no new Percy Jackson book, the series ended with "The Last Olympian." However, there is a new series that continues the Percy Jackson series, titled The Heroes of Olympus. The first book in this series is called the Lost Hero. It was released on October 12th, 2010.
There is no new Percy Jackson book, the series ended with "The Last Olympian." There is, however, going to be a new Camp Half-Blood series which focuses on the subjects of the next great prohecy, which Rachel made.
Labryinth
The first book in the Percy Jackson series is called The Lightning Thief.
No. Percy Jackson and the Olympians is the full name of the series, while Percy Jackson is the shortened, abbreviated name people like to use (it's a lot easier to say). The real second book of the series is Percy Jackson and the Sea of Monsters.
Poseidon, king of the sea
The series is called Percy Jackson and the Olympians. The Lightning Thief is the first book in the series. The others (in order) are the Sea of Monsters, the Battle at Labyrinth, and the Last Olympian. (Hope I was helpful! ^-^)