Once upon a time, the kingdoms of Wales were rife with magic and conflict, and eighteen-year-old Mererid “Mer” is well-acquainted with both. She is the last living water diviner and has spent years running from the prince who bound her into his service. Under the prince’s orders, she located the wells of his enemies, and he poisoned them without her knowledge, causing hundreds of deaths. After discovering what he had done, Mer went to great lengths to disappear from his reach. Then Mer’s old handler returns with a proposition: use her powers to bring down the very prince that abused them both.

Effy Sayre has always believed in fairy tales. Haunted by visions of the Fairy King since childhood, she’s had no choice. Her tattered copy of Angharad—Emrys Myrddin’s epic about a mortal girl who falls in love with the Fairy King, then destroys him—is the only thing keeping her afloat. So when Myrddin’s family announces a contest to redesign the late author’s estate, Effy feels certain it’s her destiny. But musty, decrepit Hiraeth Manor is an impossible task, and its residents are far from welcoming.

1873. At an abandoned château on the outskirts of Paris, a dark séance is about to take place, led by acclaimed spiritualist Vaudeline D’Allaire. Known worldwide for her talent in conjuring the spirits of murder victims to ascertain the identities of the people who killed them, she is highly sought after by widows and investigators alike. Lenna Wickes has come to Paris to find answers about her sister’s death, but to do so, she must embrace the unknown and overcome her own logic-driven bias against the occult.

I decided that Orion Lake needed to die after the second time he saved my life. Everyone loves Orion Lake. Everyone else, that is. Far as I’m concerned, he can keep his flashy combat magic to himself. I’m not joining his pack of adoring fans. I don’t need help surviving the Scholomance, even if they do. Forget the hordes of monsters and cursed artifacts; I’m probably the most dangerous thing in the place. Just give me a chance and I’ll level mountains and kill untold millions, making myself the dark queen of the world.

On the night Rune’s life changed forever, blood ran in the streets. Now, in the aftermath of a devastating revolution, witches have been diminished from powerful rulers to outcasts ruthlessly hunted due to their waning magic, and Rune must hide what she is. Spending her days pretending to be nothing more than a vapid young socialite, Rune spends her nights as the Crimson Moth, a witch vigilante who rescues her kind from being purged. When a rescue goes wrong, she decides to throw the witch hunters off her scent and gain the intel she desperately needs by courting the handsome Gideon Sharpe.