"... I like [Shereshevsky's 'Endgame Strategy'] a lot, but it has more to do with transitions from the middlegame than with endings themselves." - IM John Watson (2000)
http://theweekinchess.com/john-watson-reviews/endings-endings-endings
https://www.chess.com/article/view/quotendgame-strategyquot-by-mikhail-shereshevsky
"... The second part of [The Shereshevsky Method] is a concentrated version of Endgame Strategy, ..."
https://www.newinchess.com/media/wysiwyg/product_pdf/9056.pdf
https://chessbookreviews.wordpress.com/tag/mikhail-shereshevsky/
Secrets of Chess Endgame Strategy
https://web.archive.org/web/20140708092932/http://www.chesscafe.com/text/review550.pdf
www.gambitbooks.com/pdfs/Secrets_of_Chess_Endgame_Strategy.pdf
What is the best time or strategy for transition from middlegame to endgame? Help.