Probably the best book ever written on endgames.The book is aimed at very strong players but amateur players will "find something of interest", but i think weaker players aren't likely to get much from it, and even stronger amateurs will have to put in a lot of work to benefit. If you wish to make a serious study of the endgame, this is the book to have at your fingertips.
As it's a paperbook It would not last for many years but the quality of things which it has will definitely push your level Overall it's Okay to buy it If you are into serious Chess and want to improve drastically on Endgame !