I found this list (along with their contents) of books to be extremely useful at my game table. I definitely recommend purchasing this if you wish to quickly and painlessly add depth to a Forgotten Realms game that you are running.

A fun little document with amusing book titles and backcover style descriptions. I find it very useful as fluff for a campaign, and I may end up using a few of the books as downtime research depending on what my party is looking into. :)