  This is a textbook for students who  want to learn quantum mechanics, but learn it in a way that emphasizes  physical clarity. The book covers topics of a standard introduction  to quantum physics, but focuses attention on questions of ontology  often glossed over in standard texts. The physics student who wants to  learn quantum mechanics either as preparation for studying foundations  or simply in a way that looks for clear answers to questions like ‘What  are the basic objects in the quantum world?’, ‘What kinds of  configurations can they assume?’, ‘How do they move and interact with one  another?’ can do no better than starting here.  