Joseph Beuys (1921-1986) was photographed extensively during his life--at work, while traveling or at home. But only a few photographers had the privileged access and tenacity of Klaus Staeck and Gerhard Steidl. Graphic artist Staeck and printer/publisher Steidl accompanied Beuys with their cameras from 1970 until his death in 1986. Staeck and Steidl were part of Beuys' entourage, worked closely with him to produce his multiples and objects, and documented...