88 ( +1 | -1 ) silverqAll of the above are very good advices! If you want to begin a systematic study of this important kind of endgame (Maybe 50% of the endings are Rook endings), I'll recommend the following books:
"A Survival Guide to Rook Endgames" by John Emms "Rook Endgames" by Smyslov and Levenfish (A very rare superbclassic, I have it in spanish) "Capablanca's Best Chess Endgames" by Irving Chernev. (This book deals not only with Rook endgames, but you should study it, because of the practical examples and because it is A GREAT BOOK) "Secrets of Rook Endings" by John Nunn (A little advanced and deals with only one kind od Rook endgame, but is the definitive treatise on this one)
The list isn't exhaustive but hopefuly it will help you.
Post data: Study Rubinstein's games, he was the supreme master of Rook endgames.