Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fair history, poor science

Beyond Einstein provides a decent historical narrative of the efforts to unify physics: quantum mechanics with general relativity, the 4 forces with each other. It is occasionally repetitious.The book also attempts an exposition of the pertinent physics. In this, it falls far short, at every point. The exposition is too superficial to carry the historical narrative. For instance, although the reconciliation of quantum mechanics with relativity is of great importance, its essence is nowhere discussed. Simply saying that quantum mechanics is good in the small world and relativity in the large is neither adequate nor quite correct.The book reads like one of those manuals produced by a technical writer who doesn't really grasp the subject matter. The hope is that the reader won't notice. The fact that the senior author is a physicist who has done research in the field makes Beyond Einstein all the more disappointing.