9NYPL Best Book for Kids 2024
People Magazine Best Kids Book of 2024

Conjuring demons seems like something you should totally not be able to do by accident, right? Well, normally it isn't. But Bernadette Crowley is the perfect storm of magical accidents.
As the youngest in a long line of witches, demons used to be no big deal. A spell and a quick prick of the finger, and a witch like Ber can summon a demon to do anything they need--clean a mess, send a message, you name it.
But that was before Ber was diagnosed with diabetes. Now, each time she tests her blood sugar, accidental demons are slipping into the human dimension...and causing absolute chaos.
Good thing Ber and her older sister Maeve know that every magical problem has a magical solution. They'll just conjure a low-order demon to monitor her blood sugar! Bonus: they only have to bend one or two teeny, tiny rules. But before they know it, they've stumbled into deeper, more mysterious magic than they ever could have predicted. And soon it's not just Ber's magic but her entire coven that's in danger.