Two shunned Irish immigrants in Scotland start off as grave robbers to sell the dead to doctors, but decide that creating their own inventory is much easier, and become the most prolific mass-murdering duo in history.

The aging Countess of Blood, running out of virginal peasants to drain of their youthful essence, brings in a bright-eyed noble to start a new cycle of torture and murder.

In the German hinterlands, between World Wars, a family goes to bed, not knowing that their killer has been living in the walls and attics of their home like a ghost, watching, waiting for his chance to strike, in one of the most famous unsolved mysteries of all time.

As two clockmakers race against the curse of the Orloj, a curse that has already driven the city of Prague to madness and death with the Black Plague, these brothers will discover the price of trying to change history.

A young woman, raised in a town controlled by a religious zealot, must rectify a fatal mistake before a ravenous mob hangs the Old Witch, Mary Webster, in this story set just 11 years before and 100 miles from Salem, Massachusetts.

In 1922, only one person, Jack Parsons, believed that we could send a rocket into space and conjure a demon. By 1952, he had done both. But all he cared about was the Scarlet Woman he had both summoned, and lost, Marjorie Cameron.