This book is quite enjoyable to read. Fairbairn has compiled a great variety of sources for both on the board and off the board commentary. He will often give the comments of the players themselves when available. He will even sometimes give multiple assessments and variations from different important professionals. As far as the off the board stuff, he gives lengthy bios of both players at the beginning and much of the action at the time is put in the context of not only the two players friendly rivalry but also the historical events of the time. The commentaries make the games quite approachable.