John Man's work is an interesting piece of history, archaeological debate, tourist guide and visual reference to the context and history of the Terracota Army.
I have given the work three stars because although it has particular strengths there are also some areas weaknesses that perhaps detract from the works appeal. The strengths of the text derive from the author's personal knowledge of the region having visited the area the book has the feel of something like a latter day Victorian explorer's diary combining strong geographic description and imagery with pointers to those wishing to visit the Terracotta army. The text further has the benefit of including a good discussion of how the tomb was made from assessing the figures in the source material (both sizes/measurements and numbers of labourers) as well as an illuminating discussion of the mass production of the terracotta soldiers themselves.
The weakness of the work is perhaps in its attempt to write history. John Man has a fondness for very judgemental anecdotes some of which overshadow the history they describe (several unhelpful references to 20th Century totalitarianism seem to detract from understanding the First Emperor - he seems to dismiss any religious component to rulership despite his own source material seeing the Emperor as a divine figure above the law rather than an ideological dictator) he also seems to offer random anecdotes which seem to confuse the point he is making including a gratuitous attack on the Qin religion and Christianity as being incomplete concepts (it is poorly handled and verges on the offensive in it's general dismissal of all religion). Anecdotes aside he also seems to be very opaque as to where he draws his historical narrative from and seems to lack solid analysis of how the first emperor succeeded in conquering the 6 other kingdoms. This is disappointing as there are few popular texts to cover this period in English and a real opportunity seems to have been lost.
The book is worth reading but perhaps as an interesting collection of genre's, I prefer to think of it like a miniature Herodotus, a westerner travelling East reporting his journey for the benefit of a western audience. In this respect the account seems to tell us what was different in Ancient China to our own European heritage, emphasis is placed on Chinese Unity against European dis-unity and there are several other cultural red herrings thrown in to Man's cultural comparison including comparing Legalism against Machiavelli when ther are several ancient Greek works on pragmatic rulership from which a contemposry benchmark could be made.
In a nutshell the book is good where it discusses the Terracotta Army, it is less in command of it's subject when it talks around the subject.