Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good historical background, but a hazy view of quantum.

Gribbin's book is strong in introduction, but seems tofall short in properly addressing theissues of the quantum theory itself. The introduction is extremely good: one is drawn into important historical advances in theoretical physics, particularly in the study of light. Unfortunately, the transition to quantum theory is quite abrupt, and the author does not make good use of this material. It seems that the historical study of light was written almost independently of the section addressed to quantum mechanics. One is left with a hazy conception of Quantum Theory.