Reignited (Reawakened, #0.5)
by Colleen Houck

The Egyptian gods have many rules that bind their powers, but the most important one is that none of the gods are allowed to marry each other, because any resulting child would drain the magic from the cosmos. And yet, Isis and Osiris fall in love with such a passion that they are willing to rewrite the stars to create a way to be together. Seth, the evil god of chaos, desires Isis for himself, and as he gradually gains more power, he tests his ability to unmake even a god.