I read two of the books from this series so far. The first one is called Percy Jackson and the Lightning thief, the second one is called Percy Jackson and the sea of Monsters.
The Lightning thief is about a boy called Percy Jackson who gets kicked out of every school because of his behavior. He fights with other boys even if he only wants to defend his friends. When the school year is over and Percy goes home to his mothers husband, Smelly Gabe, and drives to the sea with his mother, and he discovers who he really is. In the late evening, his best friend Grover comes to their small house, monsters chaseing him. His mother packs them in Smelly Gabe’s car and drives them to a “safe place”. When they were about to reach it, Percy fights a minotaur and comes deadly close to death.
At last though, he makes it to the “safe place”, a camp for half-bloods. Half-bloods are children that have a god or goddess and a mortal as their parents. When they live in the mortal world, there are monsters that can kill them, at the camp, they are protected.
Annabeth (child of Athena and his other best friend), Grover and him are allowed to go on a quest. They have to go to the underworld and take Zeus’ stolen thunderbolt back to Mount Olympus before the Summer Solctis.
On their exciting tour, they discover the secret of Mount Olympus and their residents.