Introverted scholar Percival Endicott Whyborne wants nothing more than to live quietly with his lover, ex-Pinkerton detective Griffin Flaherty. Unfortunately, Whyborne's railroad tycoon father has other ideas, namely hiring Griffin to investigate mysterious events at a coal mine. Whyborne, Griffin, and their friend Christine travel to Threshold Mountain, a place of dark legend even before the mine burrowed into its heart.

Repressed scholar Percival Endicott Whyborne has two skills: reading dead languages and hiding in his office at the Ladysmith Museum. After the tragic death of the friend he secretly loved, he's ruthlessly suppressed any desire for another man. So when handsome ex-Pinkerton Griffin Flaherty approaches him to translate a mysterious book, Whyborne wants to finish the job and get rid of the detective as quickly as possible. Griffin left the Pinkertons following the death of his partner, hoping to start a new life. But the powerful cult that murdered Glenn has taken root in Widdershins, and only the spells in the book can stop them.

Whyborne's lover, dashing ex-Pinkerton detective Griffin Flaherty, agrees to prove Allan's innocence. But when Allan is deemed insane and locked away in the Stormhaven Lunatic Asylum, Griffin finds himself reliving the horrifying memories of his own ordeal inside a madhouse.

Introverted scholar Percival Endicott Whyborne has spent the last few months watching his lover, Griffin Flaherty, come to terms with the rejection of his adoptive family. So when an urgent telegram from Christine summons them to Egypt, Whyborne is reluctant to risk the fragile peace they've established. Until, that is, a man who seems as much animal as human tries to murder Whyborne in the museum. Amidst the ancient ruins of the pharaohs, they must join Christine and face betrayal, murder, and a legendary sorceress risen from the dead.

Between his bullying father and dissolute brother, Percival Endicott Whyborne has quite enough problematic family members to deal with. So when his sister returns to Widdershins asking for help solving the mystery of a derelict ship, Whyborne is reluctant to get involved. Until, that is, a brutal murderer strikes, leaving Whyborne and his lover Griffin no choice but to take the case. The investigation leads them deep into a conspiracy of blackmail, murder, and darkest sorcery.

Between his father's sudden - and rather suspicious - generosity, and his own rash promise to help Christine plan her wedding, Percival Endicott Whyborne has quite enough to worry about. But when the donation of a mysterious codex to the Ladysmith Museum draws the attention of a murderous cult, Whyborne finds himself in a race against time to unlock its secrets first. Griffin has a case of his own: the disappearance of an historic map, which quickly escalates to murder.

On the return voyage from Balefire Manor, Whyborne receives the worst news possible: Widdershins has fallen before the onslaught of the Fideles and their servants. There’s still time to stop the return of the Masters, but that window grows shorter by the hour. Together with Christine and Iskander, Whyborne and Griffin must reach Widdershins to face the ultimate test and decide the fate of the world, once and for all.

Whyborne’s Endicott relatives have returned to collect on the promise he made to help them take back their ancestral manor from an evil cult. In exchange, they’ll give him the key to deciphering the Wisborg Codex, which Whyborne needs to learn how to stop the masters. To that end, Whyborne, his husband Griffin, and their friends Iskander and Christine travel to a small island off the coast of Cornwall. But when they arrive at Balefire Manor, Whyborne must not only face the evil within the ancient mansion, but the painful truth about his own destiny.

When Griffin's past collides with his present, will it cost the lives of everyone he loves? Between the threat of a world-ending invasion from the Outside and unwelcome revelations about his own nature, Percival Endicott Whyborne is under a great deal of strain. His husband, Griffin Flaherty, wants to help - but how can he, when Whyborne won't tell him what's wrong?

1924, Chicago. Prohibition is in full swing and gang bosses rule the city with might - and magic. When Sam Cunningham flees his small-town life to try his luck in the big city of Chicago, he quickly finds himself in over his head in a world of gangs, glitz, and glamour. Fortunately, he has his cousin Eldon to teach him the trade of hex-making. Everything changes the night Sam visits The Pride speakeasy and meets grumpy cheetah-shifter Alistair Gatti.

Widdershins has been unusually quiet for months. But now a mysterious creature from the Outside is on the loose, assassinating members of the town's old families by draining their blood. Whyborne and Griffin set out to solve the mystery -- but as the evidence piles up, the police begin to suspect Whyborne himself is the murderer.

Librarian Sebastian Rath is the only one who believes his friend Kelly O’Neil disappeared due to foul play. But without any clues or outside assistance, there’s nothing he can do to prove it. When bookbinder Vesper Rune is hired to fill the vacancy left by O’Neil, he receives an ominous letter warning him to leave. After he saves Sebastian from a pair of threatening men, the two decide to join forces and get to the truth about what happened to O’Neil. 

Lord Crane has never had a lover quite as elusive as Stephen Day. He knows Stephen's job as justiciar requires secrecy, but the magician is doing his disappearing act more than seems reasonable - especially since Crane will soon return to his home in China. Then a blackmailer threatens to expose their illicit relationship. And as Stephen investigates a plague of giant rats sweeping London, his sudden increase in power, boosted by his blood-and-sex bond with Crane, is rousing suspicion that he's turned warlock.

With the justiciary understaffed, a series of horrifying occult murders to be investigated, and a young student who is flying - literally - off the rails, magical law enforcer Stephen Day is under increasing stress. And his relationship with his aristocratic lover, Lord Crane, is beginning to feel the strain. Crane chafes at the restrictions of England's laws, and there's a worrying development in the blood-and-sex bond he shares with Stephen. A development that makes a sensible man question if they should be together at all.

What happens when an exorcist falls in love with the demon he's supposed to destroy? Unregistered paranormal Caleb Jansen only wants a normal life. But when the demon-hunting spirit Gray accidentally possesses him, Caleb finds himself in a countdown for his very existence.