By Wayne G. Sayles, 312pp. hb, fully illustrated, dj, tables, charts, maps.  Krause Publications, 2007.  New, signed by the author.   This book approaches the subject of Greek coinage with the intention of helping collectors differentiate between coins of the Archaic, Classical and Hellenistic periods. With this book's condensed and easy-to-follow format, today's busy collectors can access essential information quickly. The coverage in this expanded edition serves as a roadmap of Greek coinage history, blending collecting details, history, and art into a must-have research resource.