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Message:: [QUOTE="GSDykes, post: 2133787, member: 73321"]The pro version is the one I refer to most. The smaller spiral bound "United States Coins" 2015, is handy, and adds data not seen in the pro. Publishers use this as a gimmick to encourage users to buy both. Why not add more gimmicks and buy the "Blue Book" as well?? I say put all the data into one volume. The new Big Red Book looks tantalizing. I wonder if it gives metal percentages (for example a NiCu coin has what percentage copper and what percentage nickel)?  It would also be nice if it were known how many dies were used in the minting process of such and such a coin. Like how many dies were used to make all of the 2010 D nickels in 2010?Also information on the types and manufacturers of the minting presses themselves, what types are used and what tonnages were applied. The data is there!! But not put into nice book forms. When future books contain these types of data as well as metallurgical data, the we would have a very very useful resource. Add specific gravity readings for each coin type as well......At my age, I may not live to see one. But -- PUBLISHERS TAKE NOTE  -- I think a need does exist, and is growing.Gary[/QUOTE]