This book contains copious information regarding the geographic spread of various pagan "Gods" not members of the original Roman pantheon. If you need this information, the book becomes indispensable and should be in any serious students library who is concerned with the religious atmosphere of the Roman World circa 300 BCE to 400 CE. This being said, that is the long and the short of it. The translation from French is not the best. The deeper insights one might expect are largely missing. And the explanation of the triumph of Christianity as presented is shallow and of little value. This book, one of a series of translations and reissues in the English language, commissioned by the University of Manchester, hangs its hat on the fact that it is an update of the classic work of Franz Cumont. For the generalist, the book is a loss and confusing. For the specialist, who needs a travelogue of certain Gods, the book is indispensable. Expect to work hard for what you get. Expect the prose to flow like mud, and where the translation breaks down expect confusion. I stress that this was a necessary read for my interests. There is much to be gained here. You only have to decide if you wish to pay the price.