I got started on a series of books released by the North American Hunting Club. the one above is a good primer on game rifles, but there are plenty of others on elk hunting, white tail deer hunting, waterfowl hunting, etc. I don't know if the NAHC makes these books anymore. I bought all of mine either on ebay, the thriftstore or antique store. guess it really depends on what sort of firearms you're looking to familiarize yourself with.