Witch and Yale historian Diana Bishop discovers an enchanted manuscript, attracting the attention of 1,500-year-old vampire Matthew Clairmont. The orphaned daughter of two powerful witches, Bishop prefers intellect, but relies on magic when her discovery of a palimpsest documenting the origin of supernatural species releases an assortment of undead who threaten, stalk, and harass her.

Offered a coveted job to analyze and conserve a priceless Sarajevo Haggadah, Australian rare-book expert Hanna Heath discovers a series of tiny artifacts in the volume's ancient binding that reveal its historically significant origins.

"With the stroke of a pen, twenty-three-year-old Ivy Radcliffe becomes Lady Hayworth, owner of a sprawling estate on the Yorkshire moors. Ivy has never heard of Blackwood Abbey, or of the ancient bloodline from which she's descended. With nothing to keep her in London since losing her brother in the Great War, she warily makes her way to her new home. The abbey is foreboding, the servants reserved and suspicious. But there is a treasure waiting behind...