The Book of Life by Deborah Harkness is the third and final book in the All Souls Trilogy, following the earlier two books in the series - A Discovery of Witches: A Novel (All Souls Trilogy) and Shadow of Night (All Souls Trilogy, Bk 2). After two years of impatient but excited wait for readers, witch Diana Bishop, also a historian, and vampire Matthew Clairmont, who is also her husband and a scientist, return from the past to the present to continue their all-important search for the crucial but long-missing pages of Ashmole 782, an enchanted alchemical manuscript, commonly known as the Book of Life. This is no ordinary book as it holds the key to the origin of all supernatural beings. Its massive importance is widely known and a lot of evil forces are also searching for it.