Below is a list of print reference resources on or related to World War II that are located on the library's main floor. These resources can help provide useful background information on topics with which you're not familiar, and they often list recommended resources in their bibliography sections.
The Columbia Guide to the Holocaust by 
Encyclopedia of the Holocaust by 
The Encyclopedia of World War II by 
The Holocaust Encyclopedia by 
The United States Holocaust Memorial Museum Encyclopedia of Camps and Ghettos, 1933-1945 by 
World War II at Sea: An Encyclopedia by