Anyone know of any good (i.e. non-hagiographical) biographies on Rav Samson Rafael Hirsch zt"l?
Here's (PDF) an interesting essay-length one that was recently forwarded to me.
I. Grunfeld, Three Generations: The Influence of Samson Raphael Hirsch on Jewish Life and Thought (1958)
J. L. Blau, Modern Varieties of Judaism (1966).
Though their biographies are indeed usually hagiographical, Artscroll's biography on Rav Hirsch is actually full of very detailed and accurate information.