The murders of three Christian children are being blamed on the innocent Jews of 12th century Cambridge, England in the first installment of this historical mystery series. In order to clear their name, King Henry calls for an expert, a master of the art of death, to determine who is really to blame. Instead, he gets a mistress, Adelia Aguilar, a trained physician from Salerno, Italy. She is talented, stubborn and on a dangerous mission to discover the real killer, who is still roaming Cambridge, perhaps under her very nose.

Before I Go to Sleep is SJ Watson's first novel, a thriller in the mold of Christopher Nolan's film on the impermanence of memory, Memento.  The novel's heroine and storyteller, Chrissie, awakes in a strange bed, with a strange man sleeping beside her.  A look in the bathroom mirror reveals a woman some 20 years older than she last remembers.  Who is she, and how did she get here?