The Broadway branch proudly claims to have "8 miles of books"; craning your neck among the tall-as-trees stacks will likely net you something from the mix of new and old. Rare books are next door, at 826 Broadway, on the third floor. The Fulton Street branch is near South Street Seaport; it's decidedly less overwhelming. Subway: L, N, Q, R, W, 4, 5, 6 to 14th St./Union Sq. Other location: 95 Fulton St., between Gold and William Sts., Lower Manhattan, PHONE: 212/732-6070; Subway: A, C, J, M, Z, 1, 2, 4, 5 to Fulton St./Broadway-Nassau.