El and the Eternal Stones by Rivan V. King
Within the Communion, under the wise rule of the Twelve Eternal Stones – gods, who nobody can see or hear except for the messenger – thrive all the mythical fairies, sirens, vampires, spirits, werewolves and mages. Unlike the rest of the Communion, the Light mage El finds it impossible to fit into the perfect picture the Stones had envisioned centuries ago with her weak magic, passionate curiosity and undying thirst for adventure. Through fantastic challenges, unlikely companionships, deadly riddles, Dark magic and unforgettable fun, El will eventually find out what the evil is in a world that is all good…