"Shadow of Night" is the second book in the All Souls Trilogy by Deborah Harkness. It continues the story of Diana Bishop, a witch and historian, and her vampire husband, Matthew Clairmont, as they travel back to the year 1590. Their journey aims to uncover the secrets of a mysterious manuscript known as Ashmole 782. In this historical fantasy, Diana and Matthew encounter various historical figures, including Christopher Marlowe and Queen Elizabeth I. The novel explores themes of love, power, and the complexities of their supernatural world, while also delving into the challenges of navigating life in the past.