"The key to oral history is proper research around a subject's memories, and this Mortimer has wisely done, and thoroughly so, producing a highly authoritative but also absorbing account. Sensibly, he does not linger on their foundation and exploits in north Africa, for which the wartime SAS is still best known, and about which the most has already been written. Rather he gives much weight to the expansion and development of the SAS and their wide participation in Europe, highlighting not only their numerous successes, but also the inter-battalion tensions and later shortcomings in training. Recounted with breathless pace and very effective use of first-hand testimonies, and supported by a superb collection of photographs and documents, this is a fascinating and hugely enjoyable book. It should prove an important starting point for anyone wanting to learn more about the early years of this legendary regiment." - BBC History Magazine