Neither nor. Capablanca's books aren't endgame. primers. Keres conceptual idea has produced better followers. De La Villa, Dvoretzki, Müller, Nunn are better today of it's about endgame technique.
Keres or Capablanca for end-game study?

Capablanca's 60 Best Endings, is probably one of the best endgame books ever written. However it is not about how to play certain endings, rather how he played certain endings. So it is more of a endgame collection, while other mentioned by hpmobil are theoretical works on endgame.
I want to choose among these two and their end-game books. I don't know a lot, only that Capablanca is "classic" and Keres "positional".
Has anyone read any of their books?