how to improve your game by studying endgame?
"... we can see from the above that players who are happy as White to play for a small edge in a queenless middlegame have a number of lines where they can achieve the sort of position they want. Even in other variations, the willingness to settle for a near-equal endgame, rather than trying to obtain an objective opening advantage, makes one's whole job of opening repertoire management very much easier. ... With his superb intuition and depth of positional understanding, [Petrosian] was accustomed to treating the opening relatively flippantly, and did not normally strive very hard to gain a theoretical advantage. ... it seems to me that for many players below master level, having a repertoire where there is minimal need to prepare could in fact be quite attractive. It must be remembered that, despite its shortcomings, Petrosian's approach proved good enough to wrest the world title out of the hands of Botvinnik, one of the best-prepared players ever. ..." - FM Steve Giddins (2003)
Various endgame study possibilities discussed at:
https://web.archive.org/web/20140708103149/http://www.chesscafe.com/text/review594.pdf
https://www.silmanjamespress.com/shop/chess/silmans-complete-endgame-course/
https://chessbookreviews.wordpress.com/tag/chess-endgames-for-kids/
http://www.gambitbooks.com/pdfs/Chess_Endgames_for_Kids.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/7742.pdf
https://www.chess.com/article/view/book-review-winning-chess-endings
https://web.archive.org/web/20140708105702/http://www.chesscafe.com/text/review645.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/9026.pdf
http://chessimprover.com/averbakhs-chess-endings-essential-knowledge/
https://web.archive.org/web/20140708101138/http://www.chesscafe.com/text/review373.pdf
https://web.archive.org/web/20140708234309/http://www.chesscafe.com/text/review704.pdf
http://www.gambitbooks.com/pdfs/Understanding_Chess_Endgames.pdf
http://theweekinchess.com/john-watson-reviews/endings-endings-endings
http://theweekinchess.com/john-watson-reviews/the-end-game-comes-before-we-know-it
http://theweekinchess.com/john-watson-reviews/theres-an-end-to-it-all
Before buying any particular book, I suggest going to the publisher site to see if it is possible to view a sample.

Casablanca may have been the first World Champion to advocate the study of endgame.
Casablanca was a movie
Capablanca was the player :-)

Petrosian and Botvinnik games are also for studying endgame. any good modern player for endgame?
Two of the Viking kind: Ulf Andersson, and (of course) Magnus.
Petrosian and Botvinnik games are also for studying endgame. any good modern player for endgame?
Two of the Viking kind: Ulf Andersson, and (of course) Magnus.
Petrosian and Botvinnik games are also for studying endgame. any good modern player for endgame?
Two of the Viking kind: Ulf Andersson, and (of course) Magnus.