Mariel Spark is prophesied to be the most powerful witch seen in centuries of the famed Spark family, but to the displeasure of her mother, she prefers baking to potions and gardening to hexes. When a spell to summon flour goes very wrong, Mariel finds herself staring down a demon—one she inadvertently summoned for a soul bargain. Ozroth the Ruthless is a legend among demons. Powerful and merciless, he drives hard bargains to collect mortal souls. But his deadly reputation has suffered ever since a bargain went awry—if he can strike a bargain with Mariel, he will earn it back.

Scarlett Vandermeer is swimming upstream. A Junior at Stanford and a student-athlete who specializes in platform diving, Scarlett prefers to keep her head down, concentrating on getting into med school and on recovering from the injury. She has no time for relationships. Swim captain, world champion, all-around aquatics golden boy Lukas Blomqvist thrives on discipline. It’s how he wins gold medals and breaks records: complete focus, with every stroke. On the surface, Lukas and Scarlett have nothing in common. Until a well-guarded secret slips out, and everything changes.

Cassie Greenberg loves being an artist, but it’s a tough way to make a living. On the brink of eviction, she’s desperate when she finds a too-good-to-be-true apartment in a beautiful Chicago neighborhood. Cassie knows there has to be a catch—only someone with a secret to hide would rent out a room for that price.

Mackenzie Carter has had some very bad dates lately. Model train experts, mansplainers, guys weirdly obsessed with her tail—she hasn’t had a successful date in months. Only a year out of residency, her grandmother’s obsession with Mackenzie finding the perfect mate to settle down with threatens to drive Mackenzie barking mad. Out of options, it feels like a small thing to tell her grandmother that she’s met someone. That is, until she blurts out the name of the first man she sees and the last man she would ever date: Noah Taylor, the big bad wolf of Denver General.

So here’s the deal—I’m a magical disaster. A witch from a family of witches, and the only one whose magic blows up in her face. Which is why I came up with my rules....