In the book, the author presents 120 examples in which the reader is asked to decide whether to simplify the position and choose the exchange of pieces (and if so, which ones) or to avoid the exchange. All of the examples are either endgames or positions where the middlegame goes to the endgame. All examples are annotated in detail. Author is strong Lithuanian GM, he was 2x country champion, 10x played in olympiads, won 45 international tournaments. The endgames are his specialties - he is the author of several books, among them the successful The Correct Exchange in the Endgame. Further information about the book and a sample are available at thinkerspublishing.com. 2 pictures.