Jewish Book Week activities proliferated and were extended to a one-month period in 1943. At the same time, the National Committee for Jewish Book Week became the Jewish Book Council, reflecting its broader scope. In March of the following year, the National Jewish Welfare Board, which would ultimately become the Jewish Community Centers Association, entered into an agreement with the Book Council to become its official sponsor and coordinating organization, providing financial support and organizational assistance. This arrangement reflected the realization that local JCCs were the primary site of community book fairs.