On a small island in a remote corner of northwest Scotland lies Maundrell castle, owned by its wealthy namesake family for centuries—until now. Edwina Nunn is shocked to learn a relative she never heard of has bequeathed the castle and its land to her. What awaits Edie and her teenage daughter, Neve, is even more startling, for the castle is home to a multitude of ghosts. Yet there's a strange beauty in the austere architecture and the eerie, bloody waters of Loch na Scáthanna, the Lake of Shadows.

Coming from a long line of famous witches, I should be at the top of the heap. Problem is, if there’s a spell cast anywhere near me, I‘ll somehow mess it up. As a probationary agent with the Arcane Bureau of Investigation, I have two choices: I can limp along and maybe pass myself off as a competent agent, or I can die.

Since time immemorial, the Haddesley family has tended the cranberry bog. In exchange, the bog sustains them. The staunch seasons of their lives are governed by a strict covenant that is renewed each generation with the ritual sacrifice of their patriarch, and in return, the bog produces a “bog-wife.” Brought to life from vegetation, this woman is meant to carry on the family line. But when the bog fails—or refuses—to honor the bargain, the Haddesleys, a group of discordant siblings still grieving the mother who mysteriously disappeared years earlier, face an unknown future.

1692. On the outskirts of Salem, a bookstore stands covered in overgrown vines. Inside, a young woman hides a linen-wrapped journal under a loose floorboard and runs away, panicked by the sound of hounds barking in the distance. The bookstore vanishes into thin air…

There hasn’t been a witch born in the Orchière clan for generations. According to the elders, that line is dead, leaving the clan vulnerable to the whims of superstitious villagers and the prejudices of fearmongering bishops.