W or the memory of passages from Ulysses
Books you were going to write with letters for titles. Have you read his F? O yes, but I prefer Q. Yes, but W is wonderful. O yes, W. Remember your epiphanies on green oval leaves, deeply deep, copies to be sent if you died to all the great libraries of the world, including Alexandria? Someone was to read them there after a few thousand years, a mahamanvantara. —Joyce, Ulysses*
Time's Top 10 Books With One-Letter Titles includes V., M, Z, S., and C.
*This passage also appears in the 14th ed. of The Chicago Manual of Style