There are three very interesting articles on Einstein in the December 2004 issue of Isis, the Journal of the History of Science Society, with a 3-page introduction by Peter Galison (which includes a brief but valuable bibliography of recent scholarship on Einstein). The articles are: Olivier Darrigol, The Mystery of the Einstein-Poincare' Connection, pp. 614-626; Fred Jerome, Einstein, Race, and the Myth of the Cultural Icon, pp. 627-639; Juergen Renn, The Relativity Revolution from the Perspective of Historical Epistemology, pp. 640-648. The article by Darrigol does not take a position on "direct borrowing" versus "common previous influences" in accounting for the similarity in the work of Einstein and Poincare, but reviews a lot of what has been written and gets the reader into the literature.
Judith V. Grabiner Flora Sanborn Pitzer Professor of Mathematics, Pitzer College