Roman Coin And Their Values Vol-II, The Accesion of Nerva to the Overthrow of the Severan Dynasy, By David R Sear.
Hard Cover, 696 Pages, 
Volume II extends coverage of the Imperial series from Nerva, the 'thirteenth Caesar' and first of the 'Adoptive' emperors, down to the overthrow of the Severan dynasty in 235. It encompasses what may justifiably be termed the 'golden age' of the Roman imperial coinage. The full development of the Augustan system of coin denomination and perfection of the method by which government propaganda was communicated to the citizenry through the medium of coinage both reached their peak during these fourteen decades.