If you are a fan of the Michael Apted's 7 Up series of documentaries where he interviews the same group of children, now adults, every 7 years, you will be fascinated by Peter Feldstein's The Oxford Project. In 1985, Peter photographed 670 residents of the town of Oxford, Iowa and 21 years later went back to revisit his subjects. This time be brought along writer Stephen Bloom to interview the residents about their lives. It's now in book form and you can check the site for more info.