Black Witch Magic by Mila Nicks

Librarian by day, cursed witch by night:

Selene Blackstone spends her days camped out in library corners with her nose glued to books. In a town like Brimrock, where she’s an outcast, she prefers her book friends to her real-life enemies. They’re a lot less judgmental. The rest of town believes she descends from a family of witches—including her evil witch grandma, Luna. In this case, the truth is stranger than fiction. She is a witch, and she’s cursed for all of eternity. Good thing her to-be-read list is pretty long…

Prickly Paranormal Investigator Aiden O’Hare speaks two languages: sarcasm and more sarcasm. He travels the country—and sometimes even the world—investigating strange phenomena with his best friend, Eddie. Their investigations bring them to a cozy New England town called Brimrock, home to fabled evil witch Luna Blackstone. Armed with his dry wit, his bibliophilic love for books, and far too much free time, he’s determined to find out just what happened to Luna…

When Aiden meets Selene, he decides he must get to know her. When Selene learns Aiden is in town investigating her grandma, she knows she must stop him. He’s out to expose the truth. She’s out to keep it a secret. Neither expects to fall under each other’s spell, but sometimes love is supernatural.