I'd start with Lyman 49 and the latest Sierra manual. That will give you plenty of current recipes. After that I'd buy some older manuals and books. The stuff written before 1980 has been very informative. I especially like the older Lyman and Pre-Omark Speer manuals. I can usually find older Speer manuals for $3-9.00 depending on the quality.
Check out Castpics and see what you can find.