'The Everything Soapmaking Book' by Alicia Grosso is a wonderful book for coloring info. The edition that I have (2nd edition 2007) doesn't contain anything about master-batching, though, and I'm not sure whether or not any later editions include it either.
Having said that, we have lots of info right here on the forum in regards to coloring and master-batching. In regards to master-batching, I myself do it all the time with my lye solution, but not my oils/fats- but I know that several members here do both. Here are some good threads on master-batching: