All of Us Murderers

"When Zeb Wyckham is summoned to a wealthy relative's remote Gothic house on Dartmoor, he finds all the people he least wants to see in the world - his estranged brother, his loathsome cousins, and his bitter ex-lover, Gideon Grey. Nothing, he is certain, could possibly be worse. Then the grizzled old patriarch announces the true purpose of the gathering: He intends to leave the vast family fortune to whichever of the men marries Cousin Jessamine, setting off a violent scramble for her hand and his wealth. Disinterested in being tied further to a family he can barely stand, Zeb tries to leave only to realize that he's been trapped. The walls are high, the gates are locked, and when the mists roll in, there's no way out. And there may be something trapped within the dark monstrosity of a house with them. Fear and paranoia ramping ever-higher, Zeb has nowhere to turn but to the man who once held his whole heart. As the mists descend, the gaslight flickers, and terror takes its hold, two warring lovers must reconcile in time to uncover the murderous mysteries of Lackaday House - and live to tell the tale"--