Abstract: A decade ago, it was not uncommon for researchers in quantum information theory to be fairly well-acquainted with essentially all the results in the field.Today, this is scarcely possible, as the field has grown tremendously and led to several specialized subfields.One of these is "quantum Shannon theory," the study of the fundamental limits to communication and storage when using quantum-mechanical information carriers, named after the pioneer of (classical) information theory, Claude Shannon.Although quantum Shannon theory is the oldest part of quantum information theorythe earliest investigations were concerned with the effects of the quantum nature of light on reliable communication [1]-the last ten years have produced an enormous number of fundamental results, not the least of which is an expression for the capacity of noisy quantum channels to reliably transmit quantum information.As is often the case for highly technical results, the journal literature appears as a nearly impenetrable thicket of mathematical prose to those not already well-acquainted with the field.The situation of having many exciting, but inaccessible results cries out for an introductory and pedagogical overview.Enter Quantum Information Theory by Mark M. Wilde, recently published by Cambridge University Press.This book has two target audiences and goals: It not only aims to make the results of quantum Shannon theory more comprehensible to quantum information theorists, but also to demonstrate to classical information theorists the natural continuation of topics and methods from the classical to the quantum setting.Other currently available options available to the reader interested in quantum Shannon theory, such as Nielsen & Chuang's classic Quantum Information & Computation or the excellent lecture notes of Preskill, are too outdated to cover the recent results.On the other hand, while Hayashi's Quantum