"A Short Course in Quantum Information Theory" is a concise and informative textbook that focuses on the fundamentals of quantum information theory. It offers a theoretical perspective and connects the principles of quantum information with universal concepts of physics. This book is aimed at physics students who have a basic understanding of quantum mechanics and serves as an excellent introduction to the subject. The second edition includes numerous new topics and expands the discussion to important aspects such as qubit thermodynamics, weak and continuous-time measurements, as well as quantum error corrections. The clear and concise presentation of the content makes it a valuable teaching resource for anyone looking to quickly grasp the language and central concepts of quantum information theory.