This volume, the first in a series, is intended for theoretical physicists and philosophers of science and is devoted to fundamental issues in the quantum domain. The book presents a number of discussions of experiments, theoretical puzzles and alternative interpretations, and philosophical treatments of the metaphysical foundations of science and the way in which these throw a scientific light on metaphysics. Hence the title, "Experimental Metaphysics", a term coined by Abner Shimony, to whom the book is dedicated. This collection of 16 scientific and philosophical essays by physicists, philosophers and historians of science deals with recent research and basic issues in quantum physics.