Local independent booksellers, like St. Mark’s Bookshop, can meet Downtown book lovers’ most every need. But for protesters at Occupy Wall Street who don’t have the opportunity to get up to the Village — what, with all the General Assemblies, Spokes Councils and protest actions going on — there’s the O.W.S. free library. Zach Campbell, a Ph.D. literature student, left, and Filip Marninovich, a poet, are two of the volunteer O.W.S. librarians who keep the books circulating smoothly. And they won’t come after you with a bill if you never return a tome, either. Sleeping is also permitted, even encouraged, in this library.