Belladonna Blackthorn hasn't lost her magical spark, precisely . . . but she hasn't seen it in a while either.

With her witchcraft under wraps and a toxic boss making her days miserable, Belle is struggling to keep her beloved Lunar Books afloat and just make it through the day. The last thing she has time for is perfecting her magic.

So when her thirtieth birthday brings a summons from her coven and a trial that tests her worthiness as a witch, Belle fears the worst. With only the month of October left to prove herself or risk losing her magic forever, Belle will need all the help she can get--from the women in her life, from an unlikely mentor figure and even from an infuriating coven watchman who's sworn to protect her...