If you enjoyed the
Percy Jackson and the Olympians series by Rick Riordan, then you need to read Iris, Messenger and The Night Tourist.

Iris, Messenger by Sarah Deming (DEM)
After discovering that the immortals of Greek mythology reside in her hometown of Middleville, Pennsylvania, twelve-year-old Iris listens to their life stories, gaining wisdom, beauty, and startling revelations about her past.


The Night Tourist by Katherine Marsh (PB PURPLE MAR)
Jack Perdu miraculously survives being hit by a car. He also acquires a new talent...that of seeing ghosts. Finding his way into the underground, he is helped and hunted by the spirits of famous people and mythological characters and creatures (like Cerberus) in his quest fo find his mother who died eight years before. Check out the author's website at http://www.katherinemarsh.com/ and watch for the sequel (on order): The Twilight Prisoner.