Introduction to Heelan's Quantum Mechanics and Objectivity, focused on the quantum mechanics of Heisenberg. The aim of the book is to state and analyze the 'crisis of objectivity' (or crisis of reality) in quantum physics. The method used is an analysis of the intentionality structure of quantum physics as Heisenberg conceived it to be. Through a critique, the present study seeks to arrive at a clarification of both the problem and its presuppositions and ultimately a tentative solution.