For 10 points, name this author of Pale Fire and Lolita.
In one of this author's short stories, the first letters of the words in the final paragraph reveal that the narrator is being influenced by the ghosts of Sybil and Cynthia Vane.  Fyodor writes a book about Chernyshevski in this author's novel The Gift, and Cincinnatus C. is sentenced to death for the crime of agnostical turpitude in his Invitation to a Beheading. This author also wrote a novel consisting of Charles Kinbote's commentary on a 999-line poem by John Shade, and a novel about the daughter of Charlotte Haze, who is driven across America by Humbert Humbert. For 10 points, name this author of Pale Fire and Lolita.
In one of this author's short stories, the first letters of the words in the final paragraph reveal that the narrator is being influenced by the ghosts of Sybil and Cynthia Vane.  
Vladimir {Nabokov}