Information on Sasanian numismatics has been published in journals of various societies across Europe, especially in France, Germany and Russia, but is not available in the form of books. Sasanian numismatics has been under-represented in the English literature on coins. This has posed a serious challenge for those who have acquired Sasanian-era coins as well as those who seek them, as they do not have a source of reference to turn to for guidance and assistance. This is because despite the importance of this subject, no effort has been made to publish a comprehensive and collected account of Sasanid coinage, and the information that is available is largely scattered.