I was really disappointed by this book. I confess to being something of a classics nerd, so I was hoping for a proper historical look at the gladiatorial games. And while it's true that Baker does look at most aspects of the phenomenon, he doesn't do so with a good historian's perspective.
Early in the book, he warns against applying modern sensibilities to ancient intitutions. This is a wise and reasonable approach. It is therefore a pity that he utterly abondons it, making countless judgements throughout the book. Some of these are explicit, but most are implicit in his choice of phrasing and other subtler aspects of his writing. While I agree that, to my modern morals, these games were barbaric, I find his judgements annoying and out of place in a historical work.
Another great flaw of this book is that the author takes every historical account as true. Seutonius, for example, is full of racey tales of the dark sides of the early emperors. (Plus Caesar who, despite Baker's assertions, is not considered an emporor. This isn't the only minor inaccuracy I noticed, incidentally.) However, it's doubtful that all of it, or even necessarily most of it is true. But Baker relies on Seutonius and others as literal fact upon which to base his "history". It's difficult to know how much of Baker to trust given his apparent inability to be skeptical.
Finally, the chapter on the Emperor-Gladiators is a wretched peice of work. The account of Caligula is just a transcribed Seutonius. (Why not just read the original in the first place, then?). And the overwelming majority of the chapter has nothing to do with these emperors' behavior in the arena, it's just a long liteny of how these men were depraved. This isn't the only case where Baker shows a poor ability to stay focused on his topic, but it's the most vexing.
Overall, I get the sense that Baker lacks a solid background in history. (Which may not be correct, but that's the impression this book conveys.) Instead, I get the impression of an author who is out to titillate the audience more than to provided a careful historical look at the gladiatorial games. On the one hand, this makes the book more interesting and approachable for a broad audience. On the other hand, it makes it a poor read for anyone seeking real understanding,