I chose to write a book on advanced rook endings as I simply did not wish to write another book that would be like the many already available. I have done my best to present analysis and articles I have written over the past 10–15 years. This work has been presented in my daily coaching sessions, seminars, workshops, etc. The material has helped a lot of trainees to develop into quite strong players gaining international titles and championships. The endgame is the moment of truth. It is the phase of the game where we will try to reap the seeds of our effort regardless of whether that is the full point of victory or the half point of the draw. The significance of errors increases in the endgame as the opportunities for correcting them are few. Mark Dvoretsky makes a general quote: Rook activity is the cornerstone in the evaluation and play of rook endgames. This activity may take diverse forms: from attacking the enemy pawns, to the support of one’s own passed pawns, to the interdiction or pursuit of the enemy king. There are indeed times when the rook must remain passive and implement purely defensive functions. But even then, one must stubbornly seek out any possibility of activating the rook, not even stopping at sacrificing pawns, or making your own king’s position worse.