Lycaon

History
Lycaon was once a mortal king of Arcadia, son of Pelasgus and Meliboea. He tested Zeus, who was a guest, by serving him human meat. Also he ordered a murder on Zeus while he slept, to test his immortality. Zeus became angry because of this and turned Lycaon into a wolf and killed all of his fifty sons.

The Heroes of Olympus
The Lost Hero

Jason, Piper and Leo meet Lycaon while their search for the home of Aeolus. He is ordered to kill them, except Jason, who he is ordered to kidnap. The Hunters of Artemis can stop Lycaon und he fled.