Books

Latest Release

The Red Winter

Coming February 2026

The Red Winter is a masterful retelling of the history you think you know, with dark magic, dark humor, and the lore of the first werewolf.

DELUXE EDITION—the hardcover edition of The Red Winter features beautiful red sprayed edges!

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A devastating love story. A bewitching twist on history. A blood-drenched hunt for purpose, power, and redemption.

In 1785, Professor Sebastian Grave receives the news he fears most: the terrible Beast of Gévaudan has returned, and the French countryside runs red in its wake.

Sebastian knows the Beast. A monster-slayer with centuries of experience, he joined the hunt for the creature twenty years ago and watched it slaughter its way through a long and bloody winter. Even with the help of his indwelling demon, Sarmodel – who takes payment in living hearts – it nearly cost him his life to bring the monster down.

Now, two decades later, Sebastian has been recalled to the hunt by Antoine Avenel d’Ocerne, an estranged lover who shares a dark history with the Beast and a terrible secret with Sebastian. Drawn by both the chance to finish the Beast for good and the promise of a reconciliation with Antoine, Sebastian cannot refuse.

But Gévaudan is not as he remembers it, and Sebastian’s unfinished business is everywhere he looks. Years of misery have driven the people to desperation, and France teeters on the edge of revolution. Sebastian’s arcane activities – not to mention his demonic counterpart – have also attracted the inquisitorial eye of the French clergy. And the Beast is poised to close his jaws around them all and plunge the continent into war.

The Red Winter tears the heart out of history with this dark retelling of the hunt for the Beast of Gévaudan. Lifting the veil on the hidden world behind our own, it reimagines the story of Europe, from Imperial Rome to Saint Jehanne d’Arc, the madness of Gilles de Rais and the first flickers of the French Revolution.

A kaleidoscopic blend of mythology, historical fantasy, comedy, queer love, and adventure.

Praise for The Red Winter

“The Red Winter is a hell of a debut. An absolute feast of a book: rich, red, sinfully delicious. I've rarely been this satisfied—or this hungry for more.”
— ALIX E. HARROW
New York Times bestselling author of Starling House
“So bloody good that it makes me suspect that Sullivan—like his drolly immortal protagonist—has been lurking beneath mundane notice for a very long time, only to emerge seemingly overnight to thrill us with pure mastery. The Red Winter is pungent, page-turning, absolute ripper entertainment—miss it at your peril!”
— SHELLEY PARKER-CHAN
Bestselling author of She Who Became the Sun
“A gorgeous tangle of history and fresh-made myth, The Red Winter is my platonic ideal of a debut: the moment I was done, I went looking for Sullivan's backlog and let out an actual howl of despair upon realizing there was nothing yet. You'll eat this one up.”
— CASSANDRA KHAW
USA Today bestselling author of Nothing But Blackened Teeth
“A kaleidoscopic blend of mythology, historical fantasy, comedy, queer love, and adventure. The Red Winter is a dazzlingly groundbreaking debut!”
— ALYSSA RAYMOND
Copper Dog Books (MA)
“Charming, haunting, ambitious, and a great deal of fun.”
— T. KINGFISHER
New York Times bestselling author of A Sorceress Comes to Call
“The Red Winter is a hell of a debut. An absolute feast of a book: rich, red, sinfully delicious. I've rarely been this satisfied—or this hungry for more.”
— ALIX E. HARROW
New York Times bestselling author of Starling House
“Charming, haunting, ambitious, and a great deal of fun.”
— T. KINGFISHER
New York Times bestselling author of A Sorceress Comes to Call
“A gorgeous tangle of history and fresh-made myth, The Red Winter is my platonic ideal of a debut: the moment I was done, I went looking for Sullivan's backlog and let out an actual howl of despair upon realizing there was nothing yet. You'll eat this one up.”
— CASSANDRA KHAW
USA Today bestselling author of Nothing But Blackened Teeth
“So bloody good that it makes me suspect that Sullivan—like his drolly immortal protagonist—has been lurking beneath mundane notice for a very long time, only to emerge seemingly overnight to thrill us with pure mastery. The Red Winter is pungent, page-turning, absolute ripper entertainment—miss it at your peril!”
— SHELLEY PARKER-CHAN
Bestselling author of She Who Became the Sun