A typed letter from writer Jack Kerouac to his literary agent is being auctioned by Boston-based RR Auction. The rambling, one-page missive, dated Sept. 27, 1968, and signed “JK,” was to New York literary agent Sterling Lord and concerns Kerouac’s never-completed final book, the working title of which was “Spotlight.” Kerouac explains the title this way: “I’m using the title SPOTLIGHT because that was the name of my father’s old theatrical newspaper in Lowell, when he used to play cards with W.C. Fields, George Arliss, and George Burns backstage at the old B.F. Keith’s theater . . . in Lowell. The title will honor the memory of his own work.” Lord was Kerouac’s agent and the person responsible for shopping “On the Road,” which was published in 1957. Kerouac died in 1969. The letter is among a batch of items included in a Fine Autographs and Artifacts auction that ends July 15.