Materials include personal letters exchanged with friends, correspondence with universities and other institutions, and a collection of letters and cards received by the Sachars at significant life events. Much of the correspondence with individuals relates to Sachar's involvement in cultivating support and donations for Brandeis. Other recurrent topics include Sachar's speaking engagements at various institutions, information about his many trips abroad, and birthday, anniversary, and holiday greetings. Arrangement is alphabetical.