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Silman's 'Endgame Complete Endgame Course' is very good.
my rating is 1065
Tell me free books chess related in pgn format. I am very free no work.
"Jeremy Silman - The Reassess Your Chess Workbook"
Silman's Complete Endgame Course is a great ENDGAME book
The "Winning Chess" series by Yasser Seirawan is good for you.
for where you're at, you need to study tactics. I'd recommend chess tactics for champions, and winning chess tactics for juniors.