Caster Chronicles is a series of young adult fiction novels written by Kami Garcia and Margaret Stohl that were published in the United States by Little, Brown and Company.
he falls in love with Lena Duchannes, a new girl that is part of a secret section of people called Casters, who can work magic.
Throughout the series, Lena is troubled by the fact that she must claim herself as either a Light or Dark Caster on her 16th birthday and in the first novel manages to perform a spell that prevents her from having to make the choice.
However, in the process, Ethan is mortally wounded, and Lena is forced to perform another spell to bring him back to life, which causes her to distance herself from him out of fear that he will be further harmed.
Initially, they believe that to be Lena due to her dual Light/Dark nature, but they find that it actually refers to Ethan, as his resurrection was done too quickly, and part of his soul was left behind in the underworld.
He also discovers that he can come back to life but only through a difficult ordeal that requires him to remove his page from The Caster Chronicles, which is held by the Keepers at the Gates of the Far Keep.