Planet Books is the classic used bookstore full of dusty old books and paperbacks. Planet specializes in science fiction, as the name suggests. They carry regular fiction and non-fiction of all varieties, too, and they have a modest selection of comics and periodicals. It's a fun place to rummage for an hour or so and maybe come up with something unusual. Science fiction fans should definitely check it out as they should find something to their taste, other readers may find it worth a visit as well.