the treatment of diseases, injuries, and other physical ailments with baths and bathing, especially in natural mineral waters. Origin of balneotherapy.
The name Percy originated in France. It means piercing the valley which also can mean fighting the lower side, the evil side, to reach justice. Jackson means son of Jack. I know, I don't get it either.
His physically handicapped best friend Grover reveals that Percy is a demigod and that he is his protector and his teacher Mr Brunner gives him a pen telling him that it is a powerful weapon. They go to Percy's house and together with his mother Sally they drive to the Camp Half-Blood.