Condensed ffrom: http://www.coin-newbies.com/articles/3_books_need.html
Walter Breen's Complete Encyclopedia of U.S. and Colonial Coins
The History of United States Coinage as Illustrated by the Garrett Collection by Q. David Bowers.
The U.S. Mint and Coinage by Don Taxay.
The Breen Encyclopedia changed the landscape of American numismatics. The Breen Encyclopedia brought academic scholarship to American numismatics. Breen footnotes his claims with supporting evidence from primary sources. This is how we learned to write term papers -- and the Breen Encyclopedia is nothing if not a 750-page term paper (with 4000 illustrations). The Breen Encyclopedia came out in 1988. In the last 12 years, some new facts have surfaced. These little amendments cannot detract from the overpowering value in the Breen Encyclopedia.
The Garrett Collection looks like a coffee table book. Once you look beneath the patina, you realize that you are are reading a gem of a book. Two appendices present the 19th and 20th century correspondences of the Garrett family collectors with dealers and other collectors. This book is as much about the history of American coin collecting as it is the history of American coinage.
America's coins come from America's Mints. Donald Taxay lays out the history of the Mint. This book has become a primary reference because of Taxay's careful and deliberate investigations. For all of that, the writing is lively.