Methods of Madness — Stephanie Black

It's been three years since the terrible night Emily Ramsey suffered a double tragedy -- the death of her sister and the disappearance of her fiancé. She deserves another chance at happiness, and gentle, adorable Zach Sullivan is the perfect man to mend her shattered heart. But from the moment Emily opens the hand-carved box holding a glittering diamond solitaire, she's seized by an unshakable fear: she's going to lose Zach.

That's exactly what Monica, Zach's ex-girlfriend, is banking on. Bitter with envy, Monica will stop at nothing to sabotage Zach and Emily's romance. Troubling notes show up in Emily's mailbox, fanning the flames of suspicion. A bloody photograph sends her reeling. But when someone is brutally murdered, will Emily be able to escape suspicion and the possibility that she might be next?