CKRSD Library contains most of the rare books on issues of Koch Rajbongshis of South Asia. The categories of the collection include History, Political, Economical and literature. Some of these collections are very rare and are not available in any other library. These books have been collected from various parts of South Asia by making visits to those areas. In many occasions, well wishers has come forward and donated books and publications to CKRSD library. The library is open in all working days on prior appointment.