I can ask about any science-fiction or fantasy book or movie (that I want to identify -- i.e. I don't know the exact title) on SF&F. I do the same about every movie on Movies. But, is there any site, where I can ask for a help in identifying non-fiction book (a biographical one, in my case)?
Literature is currently in public beta - anyone can participate, and so far the site is thriving. Identification questions have been deemed on-topic, and we've had a couple of dozen of them so far. Non-fiction books are also on topic, or at least some are. Go ahead and post your question over there - let's see how it fares!