Holocaust Memorial & Tolerance Center of Nassau CountyThe Louis Posner Memorial Library, at the Holocaust Memorial and Tolerance Center of Nassau County is a lending library, open to the public, with the largest collection on Long Island of materials related to the Holocaust, genocide, bullying and other related topics. The library is open by appointment. To make an appointment, for more information about the library collection, or to inquire about taking out books or other materials, call (516) 571-8040.