Bad at Magic

Theo Dane thought she was done with Hollowmare, the exclusive university for magic-users she attended eight years ago. She was a terrible student, a worse witch, and now, as a thirty-year-old barista, she's fairly certain her life is settling in to be ordinary. And probably awful.
But when she receives news of her ex-girlfriend's tragic death, then finds out the funeral is at Hollowmare...well, she doesn't really have a choice but to return. She has to say goodbye to Mel.
But Mel's death becomes suspicious when her ghost shows up. Theo was only ever good at necromancy, but even she can't communicate with Mel's spirit. Which means someone doesn't want her talking from beyond the grave.
To figure out what's happening at Hollowmare and uncover who killed Mel, Theo needs the help of her former coven members (even the one she hates) and the demon she trapped in the school fireplaces. It might even be a straightforward case...if only she weren't so bad at magic.