Some associations with The Exorcist run through Blatty's work. One of the characters satirically discusses exorcising another in Twinkle, Twinkle, "Killer" Kane (1967) and its revision as The Ninth Configuration (1978; see separate entry), and those books also concern themselves with metaphysical questions such as the nature of man and the problem of good and evil, especially self-sacrifice and redemption. Blatty also addresses both questions of the supernatural and issues concerning his mother (the basis of Father Karras's mother in The Exorcist) in his memoir, I'll Tell Them I Remember You; a lighter portrait of his mother also appears in his first book, Which Way to Mecca, Jack? (1960). However, his only novel explicitly connected to The Exorcist is Legion, a sequel written approximately a dozen years later. The similarities and differences between the two novels are fascinating (see separate entry).