Book excerpt: Most chess biographies present the games of famous players--but not their writings. Filling that gap, this book begins with Syrian master and author of chess studies Philip Stamma, and finishes with the first world champion William Steinitz. The main novelties in opening, middlegame and endgame theory in the 160 year period are examined and biographical sketches put the contributions of more than 30 masters into context. The author presents many new insights--for example, regarding the origins of the Ponziani Opening, the Dutch Defense and the Petroff Defense. French star La Bourdonnais used other sources for almost every part of his Nouveau Traite. Morphy's analysis of the Philidor Defense was faulty and Anderssen's play included many positional ideas. Harrwitz and Neumann published modern treatises long before Steinitz came out with his Modern Chess Instructor. Many ending themes belong to less well-known authors, such as Cozio, Chapais, van Zuylen van Nyevelt, Sarratt, Kling and Horwitz, Berger and Salvio.