One of my favorite songwriters, Bill Callahan (formerly known as Smog), has a book coming up on Drag City:

Letters to Emma Bowlcut , an epistolary novelette, collects sixty two letters from a nameless protagonist to a woman he saw at a party. The letters form the seduction, in sifting the loose, disparate details of his day to day — the desires, the frustrations, the joys.  The self as depicted through emotional weather updates, social observations, anecdotes,  advice, and well-timed punchlines.
Letters to Emma Bowlcut captures the sensual and esoteric qualities of letter correspondence. There is something in the time it takes the post to deliver and the physicality of the object that eventually arrives that evokes an intimacy, a depth; a desire to be known and an opportunity to present oneself in the internal fantasy of everyday’s secret internal dialogue.