"The Roman Army", edited by Chris McNab, combines portions of 25 previously published Osprey booklet titles into one well produced hard back book. For those readers familiar with the Osprey booklet format, this book will be very familiar ground. If you already have many of the Osprey titles relating to the Roman Army, you can safely consider this book an optional purchase. I bought because it is handy, I did not already have all the Osprey titles contained in the volume, and the production quality is excellent. The book is organized into four historical periods, the Early Republican Army 753-146 BC, the Army of the Late Republic 146-27 BC, the Earlier Roman Empire, 27 BC - AD 200 and finally the Later Roman Empire, AD 200 - 6th Century. There are numerous pictures, maps, diagrams, and excellent illustrations which all contribute to making the material easy to follow. Comparing it to the Adrian Goldsworthy book, "The Complete Roman Army," I have to give the nod to Goldsworthy's book if you can only own one. Goldsworthy has more detailed commentary and covers a wider range of topics in his work. Recognizing that the Osprey booklet format is constrained by design, this is a factor that limits topic discussion. Actually "The Roman Army" makes a good companion work to "The Complete Roman Army", so own them both and enjoy.