Though very short--at only around 100 pages--this is one of the most enjoyable books I’ve read recently. Its central concept is non-local correlation (nonlocality). In chapter 2, the author introduces the concept of correlation as a central concept of modern science. The introduction uses Bell’s game between two characters, Alice and Bob, but this form of presentation does not omit the deepness of the topic.

The author then stresses the importance of fundamental quantum randomness. He explains very clearly why quantum nonlocality cannot overthrow the principle of relativistic causality, which forbids superluminal communications. That is to say, the book reveals why we cannot expect communications to be faster than light.

Other aspects of the book deal with questions raised after the first quantum revolution, which led to the development of the transistor, integrated circuits, laser, and so on. The second quantum revolution addresses the following questions: Can quantum physics be applied to a single microscopic object? Do the properties of entangled pairs of quantum objects, “as described in the 1935 EPR paper but never actually observed,” have a real connection to nature? Are the limits of quantum mechanics as a theory reached?

Another aspect of the book is the ability of the author to represent the most complex concepts of quantum physics in a simple language suitable for the general public. The book explains entanglement, quantum nonlocality, and quantum randomness, and describes a number of their possible applications.

Finally, I must stress once again that the book is pleasant to read. For the nonspecialist reader, I would recommend carefully reading chapter 8, “Quantum Teleportation.” In quantum teleportation, we do not teleport the object, we teleport only its quantum state. The next very interesting chapter for a nonspecialist is chapter 10, which deals with current research in nonlocality. Overall, the book presents very complicated concepts in clear way, thus making the text enjoyable for a broad audience.

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