"Decimalisation: Calculating in Decimals" (London, Business Books Limited, for the Local Government Training Board, 1969; second impression, 1970). Softcover, approximately 140 pages (although most are only printed on one side, and thus there are roughly 80 printed pages), measuring approximately 14 x 20.9 x 0.9cm. This book is No. 3 in a series of six books which comprised "a course of self instruction programmes written for the Local Government Training Board by Learning Systems Limited", which was intended to prepare "those who do elementary written calculations in their work" for the UK's changeover to decimal currency in 1971. The cover has some bumping to the edges and corners as well as slight creasing and perhaps some fading; the pages have slightly yellowed, and some are slightly bumped to the edges and corners.