Quantum mechanics is undoubtedly the most successful scientific theory of all time. It not only explained our world but also changed it — through technology — more than anything else in human history to date. However, the image of the physical world that emerged from it is the strangest ever faced by the human mind. With the "stone of scandal" lying in the fundamental randomness of the theory, in the existence of fundamentally causeless events.

The subject of the book is the alternative interpretations to the established quantum mechanics — the Copenhagen interpretation, as it is called — which were proposed as a "remedy" to the "disease" of fundamental probabilism. The uniqueness of the book lies mainly in the author's attempt to take a topic notorious for its vagueness and the variety of conflicting versions and make it teachable at the basic undergraduate level.

A spirit of "impudence" towards dogmatic certainties, combined with a constant readiness for changes and revisions, is the intellectual attitude required by the subject of the book and the book itself. The target audience is restless students and professional scientists who have taken an undergraduate course in quantum mechanics and have a genuine curiosity to see it in the frame of radical questioning.