From Introduction - Seals and seal-engraving have occupied an honored place in the Chinese literary and artistic tradition. A brief survey of the history and development of seals and their application in Chinese life will help to ring into focus interrelated aspects of this art including their value for antiquity and natural sculptured beauty. (Description by http-mart)
Shows a very wide variety of seals styles and patterns, highly recommended, especially since it is one of the few books in English on the subject! T.C. Lai's taste in seals is good as well, I have copied several in the book to use on my own artwork. There is a Mandarin version as well.