When I was working on a 'typelist' for this site, I ran across the wikipedia entry for HST. I "edited" the section on his post-presidency. Jim Giglio at Southwest Missouri State University did the groundbreaking work on Truman's post-presidency in the journal Presidential Studies Quarterly over two decades ago. With Truman's leadership, the nation began granting pensions for former presidents (former congressmen and judges were already receiving them but Truman had to go home to live with his mother-in-law) and organied a system for every president thereafter to establish a presidential library. To this day, the Truman Library is as hospitable as when Harry was there himself almost every day between 1953 and 1964, before a terrible fall in the bathroom. Liz Safly is especially superb in assisting researchers and students.