This is a very good booklet (48 pages) on the British Mark I through VI light tank designs from the 1920s and 1930s. It includes prototypes and many one-of variants that I have not encountered in other books. The text provides reasonable design development histories with a couple of tabulations of weights, dimensions, engine horsepower and speed, and armament. It appears that much data and development history for some of the models has been lost over the decades, as is acknowledged in the text. The text is accompanied by many period black and white photos and a couple of color renderings. There is a short 15-pages description of deployment in WW II in France, North Africa, and Greece, where they proved to be militarily useless.