MBarnum, you may not need to sell your books! I had the "musty odor" syndrome in old books and old LPs, and my mother, in one of her rare lucid moments (joke, kind of) suggested I put those scented dryer sheets in amongst the pages and inside the LP jackets. Lo and behold, it worked! (Sometimes it took two or three, replaced a couple of times, but it eventually always got rid of the smell).