Sweet legacy - Tera Lynn Childs

The teenage descendants of Medusa - Gretchen, Grace and Greer - face their toughest test yet as the mythological and the modern collide in a fast-paced urban fantasy adventure.
The girls cannot hesitate as they seek the location of the lost door between the realms, even as monsters and the gods of Olympus descend on San Francisco in battle-ready droves. Greer must use her second sight to prevent anything from stopping her sisters' mission - even though a god is playing with her mind. Grace wants to trust her adopted brother, Thane, but will his secret put the girls in even more danger? And Gretchen has trained her sisters to stop the monsters, but her role as a huntress comes with more responsibility than she ever imagined. What will the girls' immortal legacy be? The concluding book in this action-packed series with plenty of romance.