Imprisoned Mate of the Vampire King

She walked into the prison her own magic built to free a vampire king, and now she has to pretend she is in love with him.

The spell that formed this place failed in ways she never expected, filling half the cells with deadly, psychotic immortals and the rest with innocents trapped by someone who exploited those flaws.

She is the only way anyone gets out, a secret that would get her killed if it ever spread.

The vampire king she came to save insists he will keep her alive, though she cannot tell how much of that protection is real.

Acting obsessed with each other is their best chance of walking free, and both of them will do whatever it takes—even a mate bond.