This curious cylinder on stilts is a Little Free Library located at St. Patrick’s Old Cathedral School in Manhattan. The library has portholes built into its walls so visitors can peek in (or out). Inside, a shelf holds a small selection of books for borrowing. Designed by Marcelo Ertorteguy and Sara Valente of Stereotank, the library is 1 of 10 different designs that were built in New York City as part of the recent PEN World Voices Festival of International Literature, in a project organized by the The Architectural League. The 10 Manhattan libraries are part of the ongoing Little Free Library project. Stereotank’s library is scheduled to remain open until September 2013.