The All Souls Trilogy is a three-book series written by Deborah Harkness. The books follow the story of a witch named Diana and a vampire named Matthew who seem to be destined to be together. They face many difficulties and are forced to defend themselves and each other against those of their own kind.
Deborah Harkness released a companion book in May 2018 entitled The World of All Souls: The Complete Guide to A Discovery of Witches, Shadow of Night, and The Book of Life (All Souls Trilogy), and released a book in another series set in the same universe featuring secondary characters in The All Souls Trilogy — Time's Convert, published September 2018. The book stars Marcus Whitmore, Matthew Clairmont's vampire son.
The UK television adaptation of the first book in the trilogy, A Discovery of Witches, premiered in September 2018 and was produced by Sky TV; the third and final season aired January 7, 2022.