Gatekeeper's Saga Series by Eva Pohler

Fifteen-year-old Therese watches her parents die. While in a coma, she meets the twin sons of Hades—Hypnos, the god of sleep, and Thanatos, the god of death. She thinks she's manipulating a dream, not kissing the god of death and totally rocking his world. Than makes a deal with Hades and goes as a mortal to the Upperworld to try and win Therese's heart, but not all the gods are happy. Some give her gifts. Others try to kill her... moreFifteen-year-old Therese watches her parents die. While in a coma, she meets the twin sons of Hades—Hypnos, the god of sleep, and Thanatos, the god of death. She thinks she's manipulating a dream, not kissing the god of death and totally rocking his world. Than makes a deal with Hades and goes as a mortal to the Upperworld to try and win Therese's heart, but not all the gods are happy. Some give her gifts. Others try to kill her. The deal requires Therese to avenge the death of her parents. With the help of Than’s fierce and exotic sisters, the Furies, she finds herself in an arena face to face with the murderer, and only one will survive. less

Ten agonizing months have gone by since Therese faced off against her parents’ murderer at Mount Olympus, and she suspects Thanatos’s absence is meant to send her a message: go on with your life. She tries to return Pete’s affections even though her heart aches for the god of death, but when Than shows up to take her hamster’s soul, she becomes infuriated when he says he’s “been busy... moreTen agonizing months have gone by since Therese faced off against her parents’ murderer at Mount Olympus, and she suspects Thanatos’s absence is meant to send her a message: go on with your life. She tries to return Pete’s affections even though her heart aches for the god of death, but when Than shows up to take her hamster’s soul, she becomes infuriated when he says he’s “been busy.” In cahoots with her new friend, who's gotten in with the Demon Druggies at school, Therese takes a drug that simulates a near-death experience, planning to tell Than off so she can have closure and move on, but things go very, very wrong. Eventually she learns Than has been busy searching for a way to make her a god, and he’s found it, but it requires her to complete a set of impossible challenges designed by Hades, who hopes to see her fail. less

In The Gatekeeper's Sons, Therese and Thanatos, the god of death, met and fell in love. In The Gatekeeper's Challenge, they did everything they could to be together, even break an oath on the River Styx. But the Olympians don't tolerate oath-breakers. In this third book in the saga, The Gatekeeper's Daughter, Therese may have finally succeeded in becoming a goddess, but if she wants to remain one, she'll not only have to discover her unique purpose, but also make some allies among the gods... moreIn The Gatekeeper's Sons, Therese and Thanatos, the god of death, met and fell in love. In The Gatekeeper's Challenge, they did everything they could to be together, even break an oath on the River Styx. But the Olympians don't tolerate oath-breakers. In this third book in the saga, The Gatekeeper's Daughter, Therese may have finally succeeded in becoming a goddess, but if she wants to remain one, she'll not only have to discover her unique purpose, but also make some allies among the gods. Artemis sends her on a seemingly impossible quest across the world, while Than searches for a way to appease Ares. To make matters worse, her baby sister's life depends on the outcome of her quest. less

Eighteen-year-old Therese Mills has second thoughts about marrying Thanatos when she learns no god has ever been faithful to his wife. Before she can move into Hecate's rooms, however, the Underworld is attacked, she and her friends are crushed, the souls are unleashed, and a malevolent goddess threatens to unhinge Mount Olympus... moreEighteen-year-old Therese Mills has second thoughts about marrying Thanatos when she learns no god has ever been faithful to his wife. Before she can move into Hecate's rooms, however, 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. less