Just the Facts! by Lev Alburt, Nikolay Krogius
Nothing more clearly separates chess master from chess wannabee than winning endgame play, the last lap of the race.
Depending on whether or not you command the necessary endgame knowledge, you can spoil hours of planning, or you can enjoy the victory you've spent the whole game earning.
You can even extricate yourself from the steely jaws of a "certain" defeat! Winner of the prestigious Chess Journalists of America Book of the Year award for 2000-2001, Just the Facts! boils down all essential endgame wisdom into one volume you can use to win games for the rest of your life.