CAMP HALF-BLOOD is the only place for children of the Olympian gods to live. Where else can they fight monsters and practise archery with flaming arrows and explosives?
But Camp Half-Blood's latest recruits - Jason, Piper and Leo - haven't been brought here for fun.
A major problem has arisen.
Hera, Queen of the Gods, has been imprisoned.
They are the chosen ones to save her from great evil - with only four days to complete their quest.
And that's not all. Percy Jackson, hero of the half-bloods, is missing. The second great prophecy has begun.
But the half-bloods have no idea how many enemies they've awakened. This is a war they cannot win . . .
Rick Riordan, dubbed 'storyteller of the gods' by Publishers Weekly, is the author of five New York Times number-one bestselling book series with millions of copies sold throughout the world: Percy Jackson, the Heroes of Olympus and the Trials of Apollo, based on Greek and Roman mythology; the Kane Chronicles, based on Egyptian mythology; and Magnus Chase, based on Norse mythology. Percy Jackson and the Lightning Thief, Rick's first novel featuring the heroic young demigod, won the Red House Children's Book Award and is now a blockbuster film franchise starring Logan Lerman.
To learn more about Rick and his books, you can visit him at www.rickriordan.co.uk or follow him on Twitter @camphalfblood.