You've made it! Here's the ending, the final phase of a chess game; material is much reduced and it's time to convert advantages into a win or defend to a draw. The endgame in chess is most interesting, with knowledge available on general principles and specialized e-books on techniques for handling particular pieces. Of course there are general manuals to provide a foundation in basic chess endings. All top chess players are great experts in the endgame - go thou and do likewise!