A thorough and detailed summary of the actions of various British and Empire units -- early Commando raids, the LRDG, SAS, SBS, Popski's Private Army, Jedburgh Teams, V Force and the Chindits receive most of the coverage, but various others also receive some attention -- behind enemy lines in World War 2.
Much of the appeal of this book is in Thompson's careful selection and editing of original source material (diaries, official histories, letters etc) into a set of coherent and highly readable narratives, though there is also considerable analysis of the success and failure of units and campaigns. The sections on the North African, Balkan and Eastern Mediterranean operations are particularly enlightening.
Thompson is not afraid to court controversy and spends much time and space exploring the success or otherwise of the two Chindit expeditions -- the bravery and fortitude of the soldiers is never in doubt, their training and leadership is often called into question. The evidence for Wingate as great leader or military charlatan is presented clearly and dispassionately; Thompson leaves the reader to decide.
This is a fine tribute to many groups of brave soldiers, and a superb read.