A lot of the books I have collected up are no longer in print, but most towns have a used book store or two that can be a wonderful source for music books. I found, at a little place here in St. Petersburg called the Attic Bookshop, a wealth of books. One of my favorite is A Treasury of Stephen Foster, Random House, 1946. Another oldie is a soft cover book, Memories of Stephen Foster, an Album of Songs by America's Best Loved Composer, (they thought nothing of using a paragraph for a title back then). I don't know how old it is but it is priced 50 cents net and was published by Edward B. Marks Music Corporation, RCA Building. Radio City, NY. I also quite often refer to the Banjo Players Songbook, Oak Publications. Harry Reeser instruction books for the banjo are also on my COLLECT list.