The House of Hades (The Underworld Saga)

Therese Mills has second thoughts about marrying Thanatos when she learns that no god has ever been faithful to his wife. But before she can move out of Than's rooms and into Hecate's, the Underworld is attacked, she and her friends are crushed, the souls are unleashed, and a malevolent goddess threatens to unhinge Mount Olympus.
Hypnos has just made a deal with Hades to have his turn in the Upperworld, but before he can tempt Jen with a kiss, he's called back to rebind the souls and defend the House of Hades, and he unwittingly puts Jen and her family in harm's way.
Can Hip, Than, and Therese save the living and the dead?