Another actor worthy of a book is getting one - Charles McGraw. More details on the biography are over on the Movie Morlocks blog.
Coming out in June is Joan Crawford: An Illustrated Guide to Her Appearances in Film, Radio and Television. If it truly is more of a reference than biased biography, it should be a good one.
Last, in the "take out from from library" pile is Include Me Out: My Life From Goldwyn to Broadway by Farley Granger. Note to self: skip to chapters on Rope and Strangers on a Train.