18th sentence of the 18th book

Neal Cassady (Cody Pomeray in Visions of Cody) (L) and Jack Kerouac (R)

The 18th book on my Kerouac bookshelf is another copy of Jack Kerouac's Visions of Cody (Penguin Books, 1993), and the 18th sentence (in honor of today being the 18th day of the month) is:

IN THE AUTUMN OF 1951 I began thinking of Cody Pomeray, thinking of Cody Pomeray. (p. 5)

Brownie points to anyone who can identify the Kerouac book that concludes with a very similar sentence.