This book presents an encyclopedic treatment of conceptual quantum mechanics as seen from a very up-to-date point of view. It explores the nature of quantum entanglement and quantum information and their role in the quantum world. Their relations to a number of key experiments and thought experiments in the history of quantum physics are considered, as is a range of interpretations of quantum mechanics that have been put forward as a means of understanding the fundamental nature of microphysics - the traditionally accepted domain of quantum mechanics - and in some cases, the universe as a whole. In this way, the book reveals the deep significance of entanglement and quantum information for our understanding of the physical world. – Table of contents : – Chapter 1, Superposition, Entanglement, and Limits of Local Causality; – Chapter 2, Quantum Measurement, Probability, and Logic; – Chapter 3, Interpretations of Quantum Mechanics; – Chapter 4, Information and Quantum Mechanics; – Chapter 5, Appendix. M.-M. V.