If you want to start collecting some good reference materials, this list gives you some idea of where to start looking- it covers a small selection of the books and DVDs in my Makeup & FX Library.
I currently have over 300 books in my collection, not including filmmaking books. I have books on ‘straight’ makeup as well plus other pictorial period and general references, hairstyling books, medical and forensic books, magazines, etc etc. They are in no particular order but I would start with the first two as they both contain information on the latest industry standard materials and techniques.