It seeks to make connections between the early pagan elements and the later Christian influences.
The book's main focus is on the Holy Grail tradition and its influence, particularly the Wasteland motif.
The work is mentioned by T. S. Eliot in the notes to his poem The Waste Land.
[1] The book appears in the film Apocalypse Now (1979), among those kept by the character, Colonel Walter E. Kurtz, played by Marlon Brando, along with The Golden Bough.
The book appears in the limited series Batman: Tenses, in which it is thrown in a fire by Ted Krosby before he kills his father.