There is more knowledge packed in this book than any 10 coin books combined. I now know the standards involved in Mint State grading, although the average collector like myself should understand that you probably won't be able to sit down after reading this book and tell the difference between an MS-64 and an MS-65 if you couldn't before. Still, I am much more comfortable now in all stages of grading, and much more confident when buying and selling coins. The counterfeit detection part is probably not relevant to the average collector, but it is interesting information that adds to your knowledge of the hobby and the enjoyment of collecting.