This is unquestionably one of the more important historical works of recent years. Mr. Antonius, Christian Arab and former government official in Palestine, has written the first comprehensive history of the Pan Arab movement, and he has done it with such thorough scholarship that there will be little incentive for anyone else to seek to cover the same ground. The hitherto almost unknown origins of the Pan Arab movement in the middle and latter part of the last century are brought to light. The major portion of the book concerns the World War years, on which the author tells us much that is new. He gives the texts of the famous McMahon correspondence over which so much controversy has raged. The publication of this book is in itself an event in the history of the Pan Arab movement.