While you're waiting to read the The Last Olympian, the final book in the Percy Jackson and the Olympians series, why not read some other books about gods, godesses, and other mythological characters.
Here are a few suggestions:
Abouzeid, Chris. Anatopsis.
In the realm from which the Greek gods ruled the universe thousands of years ago, the immortal witch Anatopsis uncovers the true objectives of her demi-god tutor Mr. Pound and attempts to prevent him from carrying out his evil plans.
Deming, Sarah. Iris, Messenger.
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.
Henessy, Carolyn. Pandora Gets Jealous.
Thirteen-year-old Pandy is hauled before Zeus and given six months to gather all of the evils that were released when the box she brought to school as her annual project was accidentally opened.
Jones, Diana Wynne. The Game.
Sent to a boisterous family gathering in Ireland by her overly strict grandmother, orphaned Hayley feels out of place until her unruly cousins include her in a special game involving travel through the mythosphere, the place where all the world's stories can be found, and where some secrets of her past are revealed.
Mebus, Scott. Gods of Manhattan.
Thirteen-year-old Rory discovers a spirit world that thrives alongside his contemporary New York City, filled with fantastical creatures and people from the city's colorful past who have become gods and goddesses and who have chosen Rory to perform a dangerous mission.
Ursu, Anne. The Shadow Thieves. (The Cronus Chronicles, bk.1)
After her cousin Zee arrives from England, thirteen-year-old Charlotte and he must set out to save humankind from denizens of the underworld, Nightmares, Death, Pain, and a really nasty guy named Phil.