Legends Never Die

When Perseus Jackson is abandoned by the camp he knew as home, he disappears. A few years later, tales of dangerously strong monsters dying sees Artemis on a new mission to hunt down whomever is responsible for the sudden slaying of these beasts. Zeus wants to know if it's friend or foe. What will the Goddess of the Hunt do when she finds the person responsible? And who is the mysterious man that keeps aiding young demigods in reaching their respective camps?