Nevermind the the rating—that just shows how little erotic romance works for me these days—and read this for the one adaptation of the myth that actually works!
Granted, the ones I've tried before (or wanted to) were crappy YA attempts to erase the problems without addressing the passiveness of Persephone being a pawn in a game between Demeter and Hades. No such problems here. Also, no incest.
Read it for the retelling if not the hot sex. Text includes both.