Numismatic Literature. Tye, Robert, Early World Coins & Early Weight Standards, York, 2009, 183 pages, softcover and signed by the author. This is a unique work useful to a beginner or nonspecialist looking for an overview of earlier world coinage, and the more thoughtful, seasoned collector searching out patterns behind seemingly unrelated coin types and denominations. Catalog of over 1,200 common or influential ancient and medieval coin types from Europe, Persia, India and China illustrated with excellent ink drawings and cross-referenced to the expensive Mitchiner catalogs. Maps illustrating aspects of the spread and development of coinage. Short accounts of about 170 different coin types and denominations, their origins, influence; overview of pre-modern systems of weight, and their influence on coin weights, out of print and difficult to locate book.