In case you missed it, the cover for Percy Jackson and Olympians: Wrath of the Triple Goddess was officially revealed today! The highly anticipated next installment of the Percy Jackson and the Olympians series from best-selling author Rick Riordan goes on sale September 24th.

Check out the full cover in all its glory from artist Victo Ngai and read the first synopsis below. Stay tuned in the coming months for more information on Percy Jackson and Olympians: Wrath of the Triple Goddess.

In the second of three quests Percy must complete to earn college recommendation letters from the gods, he has to pet sit the goddess Hecate’s polecat and giant mastiff during Halloween week. What could go wrong?

Percy Jackson, now a high school senior, needs three recommendation letters from the Greek gods in order to get into New Rome University. He earned his first one by retrieving Ganymede’s chalice. Now the goddess Hecate has offered Percy another “opportunity”—all he needs to do is pet sit her mastiff, Hecuba, and her polecat, Gale, over Halloween week while she is away. How hard could that be?

Percy, Annabeth, and Grover settle into Hecate’s seemingly endless mansion and start getting acquainted with the fussy, terrifying animals. The trio has been warned not to touch anything, but while Percy and Annabeth are out at school, Grover can’t resist drinking a strawberry-flavored potion in the laboratory. It turns him into a giant frenzied goat, and after he rampages through the house, damaging everything in sight, and passes out, Hecuba and Gale escape. Now the friends have to find Hecate’s pets and somehow restore the house, all before Hecate gets back on Saturday. It’s going to take luck, demigod wiles, and some old and new friends to hunt down the animals and set things right again.

Rick Riordan’s newest Percy adventure is full of hilarious set pieces, a diverse cast of gods and monsters, and many other delightful tricks and treats.