The Official Blue Book Handbook of United States Coins 2020 is a great resource for every coin collector. It contains priceless information and is especially worth it for the great price of $10. I bought this book on Amazon last year and I use it all the time. This book contains all of the mintages and prices of US coins and has very useful information about the history of US coinage. Whenever I go to appraise people's coin collections, this is the first resource I grab. The only suggestion I have for the publishers is that the values of constitutional (junk silver) is based on the melt value of silver at the time. This mainly has to do with the increase in silver spot price since it was printed. For example, a common Roosevelt silver dime in VF or EF condition is listed at $1.10 but the melt value as of me writing this is just under $2. I know that the value of silver is out of their control, but it would be a good idea to explicitly say that the value of common silver coins is based on the melt value of it the coin. All in all, this book is the best possible resource for US coins I have ever used. I will be buying the 2021 US Coins Blue Book this year for sure!