«'Gray's newest edition has made several key improvements that will render it an important book not only for stellar atmospheres and evolution courses, but also for courses involving modern instrumentation techniques or for anyone working in the field of exoplanets. Each chapter is clearly and logically laid out and extensively referenced, including exercises to support scaffolded learning throughout the undergraduate and graduate curriculum; this makes the book an easy choice for professors teaching both introductory and upper level courses. Gray's new book is destined to become an essential companion for every professional astronomer whose research is impacted by observational effects and the inner workings of stellar photospheres.' Prof. Michelle J. Creech-Eakman, New Mexico Tech»

«'Gray's textbook has been a staple for my teaching and research for the past two decades. The close connection the book makes between theory and observation has always distinguished it and made it particularly valuable. The addition of new topics and results, and the inclusion of many of the more recent, seminal references make the new edition particularly valuable for students and researchers entering the field of stellar astrophysics.' Prof. Christopher M. Johns-Krull, Rice University»

«'David Gray's book puts the decades of the author's hands-on experience, combined with his scientific ingenuity, into a form that students and young researcher love. Clearly, David Gray's book has evolved. The Fourth Edition is not just a graduate student's textbook, it is now also an up-to-date window into practical stellar astrophysical research. As in the past, all my graduate students will get it as their bible.' Prof. Klaus G. Strassmeier, University of Potsdam, and Leibniz Institute for Astrophysics, Germany»