Quantum Enigma, Bruce Rosenblum and Fred Kuttner (New York. New York, Oxford University Press, 2008) is a study and introduction to Quantum Physics written for popular audiences (math is kept to a minimum). It is a fascinating trek beyond usual quantum studies however in that Rosenblum & Kuttner not only remain at the superficial level of quantum physics (i.e., if it works go with it don't question the deeper philosophical issues) but they dare delve into the more profound implications of quantum physics (i.e., metaphysical questions) especially in relation to the extremely "hard" question of the relation of consciousness to quantum physics, hence their title Quantum Enigma.
The advanced student of quantum physics will find nothing here that he has not already well understood. Yet this is one of the best introductions to quantum physics for the lay reader out there.
R. E. Aguirre