http://www.amazon.com/Numismatic-As...ef=sr_1_8/105-3188667-4707634?ie=UTF8&s=books I don't hear too much about this book, however this is an excellent addition to any library. It has some nice photos, lots of good information such as mint tolerances for planchet weights dating way back, other miscellaneous counterfeit detection tips, as well as diagnostics of original coins etc. I would also recommend the 2nd volume.