I already have this book and was quite worried when I read a review on this site claiming that Blum had claimed Tibetans welcomed the Chinese occupation. Luckily, while the chapter in question has some faults, it claims no such thing.
I checked the chapter on China and in fact only 2 pages - 25 and 26 refer to Tibet at all. No-where in them is any reference to Tibetans welcoming the invasion or occupation. It does say that and that Tibetan guerillas opposed 'Peking rule and/or the profoundsocial changes being instituted by the revolution (serfdom and slavery were, literally, still prevalent in Tibet'). This may give the wrong impression - since it could be interpreted to mean the Chinese occupation led to a fairer or freer society while the reverse is undoubtedly the case. While Chinese human rights abuses and killings should have been mentioned for balance I feel the book is not as unbalanced as the previous reviewer suggests.
As for charges that the book is unbalanced or favours Chinese Communism here is an excerpt (from pages 26-27 - so people can check it for themselves)
'The Chinese devoted a great deal of effort to publicising their claim that the United States ....had dropped large quantities of bacteria and bacteria-laden insects over China. It presented the testimony of about 38 captured American airmen...It should be noted that some of the American's statements were so full of communist rhetoric...that their personal authorship of them must be seriously questioned. Moreover it was later learned that most of the airmen had only confessed after being subjected to physical abuse'
This seems fairly balanced to me (with the exception that in this context the euphemism 'physical abuse' should not be used in place of 'torture').
Overall I found the information in this book to be well sourced - with any problems being ommissions (e.g on Chinese human rights abuses) - but then the focus is on CIA and US military interventions - it does not pretend to analyse those of other governments and militaries.