Small? Yes. A good selection just the same? Also yes. Among the loud banter and busking of Mill Avenue, you'll spot the hanging sign for Old Town Books just south of Fifth Street. That is, if you don't first spot the small, mobile bookshelves wheeled out onto the sidewalk, or the imaginative window display they have going on. Owner Chris Smith has run the bookshop since 1984, and settled into the Mill Avenue storefront in 1987. The narrow bookstore has all the same sections as a larger shop, so you'll find titles delicately crammed in any shelf space available, along with copy paper boxes filled with books along the edge of the floor. Those interested in Arizona, Native American, and Old West history will find a good mixture of titles on the north shelves, while others can look for the vintage, first-edition, and out-of-print books the shop has to offer. Oh, and one more thing: It's cash only.