Long And Lost — Mallory Crowe

Samantha Harris is on the fast track. She's one of the Families' best employees and her magic is getting stronger by the day. Nothing is distracting her from being the perfect witch, not even Detective Derek Pierce, who claims they used to be a couple.
Derek knows that Sam's grandmother messed with her memories, but nothing he says can convince her that they had something. Something stronger than magic. But with the darkness closing in more than ever before, he needs Sam to be on her A Game to protect the city from the growing threat.

The person calling the darkness is moving the final pieces into place. The only way Sam and Derek can stop this is if they work together and this time they can lose more than their memories.