This second volume is a continuation of the first volume's 20th century conceptual foundations of quantum physics extending its view to the principles and research fields of the 21st century. A comprehensive A-Z guide on topics that usually aren't explained at an introductory level, it saves you a ton of time you could have spent searching elsewhere trying to piece all the different information together. An overview that fills the gap between a too popularized version of quantum physics and too high-level university textbooks. A review of the standard concepts, from modern advanced experimental tests of 'quantum ontology' to the interpretations of quantum mechanics, the standard model of particle physics, and the mainstream quantum gravity theories. A state-of-the-art treatise that reports on the recent developments in quantum computing, classical and quantum information theory, the black holes information paradox and the holographic principle to quantum cosmology, with some attention