Frank Dikötter has written a very lively and concise analysis of the techniques and personalities of eight 20th-century dictators: Mussolini, Hitler, Stalin, Mao Zedong, Kim Il-sung, Duvalier (Haiti), Ceausescu (Romania) and Mengistu (Ethiopia). As a comparative study of those individuals, it is enlightening and a good read. The title and parts of the foreword indicate that it aspires to be a guidebook of tactics for those aspiring to be dictators and to retain their status as such.