I may not be a "Master"...(I am pretty good with ACAD & C3D)...but I think it is safe to say that the MASTERS that are here have taken years of blood, sweat and tears (and plenty of swearing) to get to where they are. Books are a good place to start; but nothing beats practice and using the programs. (Personally, a user for 17 years.)
IMHO the "Mastering" series are good.
Others may have other suggestions.