All Books

Shadows of Graymourne Series

Graymourne, a spooky, small, fictional Vermont town where the shadows aren’t always what they seem. If you feel like they’re watching you, that’s probably because they are. Beings of magic and mischief, these shape-shifting elemental demons aren’t usually fond of humans, but sometimes there are exceptions.

Cover art for Shadow's Light by Sylvie Helstaff. A blonde woman stands in a dark hallway with a shadow demon floating overhead. Gold Filigree frame with title text.

Book One – Shadow’s Light

Shadow’s Light is a slow burn, cozy, haunted house monster romance set in a spooky, fictional New England town featuring a resilient FMC. This damsel might be in distress, but she does just as much saving as she gets saved. For readers who take comfort in the monstrous. If you ever wanted to romance your sleep paralysis demon, this one’s for you.

Cover art for Shadow & Flame by Sylvie Helstaff. A brunette man in colonial american clothing holds an open book in one hand and glowing light in the other. A shadow demon stands behind him with a hand on his shoulder. both are surrounded by purple flames.

Book Two – Shadow & Flame

Shadow & Flame is a medium burn, dark, enemies to lovers monster romance with a dual setting in present day Graymourne and its 1700s counterpart. An over-confident witch meets his match when he summons a shadow demon for protection. For readers who like their princes as dark as they are charming.

White text logo on a black background reads "Helstaff Books" with a purple eclipsing moon icon

Book Three – Coming Soon

The third installment of the Graymourne series will feature a non-binary MC with sapphic love interests.

Infernal Affairs

Demons and their divine counterparts are as real as humans. Hell is just a place. Heaven isn’t quite what we thought. And sometimes salvation comes in forms we never expected.

Stained glass style illustration of a non-binary person in the center with a purple tail wrapped over their shoulder, they are standing in a garden of flowers with two demons behind them. Author name Sylvie Helstaff appears at the top of the frame and book title "Lust and Found" in gold text at the bottom

Lust and Found

When Rowan’s eccentric great aunt died, they felt lost. The lone queer sheep in a flock of faithful lambs. But when they move into the late woman’s house, a cleaning accident activates a dormant ritual and they’re suddenly confronted with two revelations: magic is real and demons are surprisingly hot. At least this one is.

Hound for Hell

Coming 2026
An exorcism gone wrong lands a self-righteous priest in the custody of a fallen angel. But when he finds he’s more pet than prisoner and nothing in the infernal realm is what he expected, it turns everything he thought he knew on its head. And just maybe he’d rather be happy as a hound in Hell than miserable as a man on Earth.

White text logo on a black background reads "Helstaff Books" with a purple eclipsing moon icon

Book 3

TBD

Short Stories

Novellas, novelettes, and other short form tales of romance and monsters.

illustrated book cover with a partially submerged green haired mermaid. Title "Swim with me, Darling" in horror font that looks like its floating on the water

Swim With Me, Darling

Swim with Me, Darling is a polyamorous sapphic horrormance novella about the depths of desire and the lengths we go to for love. For fans of folk tales and the “good for her” genre of horror. Jennifer’s Body meets The Little Mermaid, but make it gay.

White text logo on a black background reads "Helstaff Books" with a purple eclipsing moon icon

Book 2

Coming 2026

White text logo on a black background reads "Helstaff Books" with a purple eclipsing moon icon

Book 3

TBD