[Polkinghorne] offers much insight in this thoroughly delightful little book into the nature of the conceptual problems at the heart of the twentieth centurys most successful theory. . . . I wholeheartedly recommend The Quantum World. . . . --Tony Hey, New Scientist A delightful book, written at a popular level but without any misleading over-simplification. --Roger Penrose, The Times Higher Education Supplement The author`s life as well as his oeuvre, especially this lovely little book, bear testimony to the fact that . . . science and nature can coexist in harmonious complementarity. --Abraham Pais, Nature