Principles of Turbomachinery - Second Edition

Prior to the purchase I read several good reviews. I completely disagree. The book does not show how equations are obtained, saying only "it can be shown that...". Examples are not clear and many discussions contain phrases like "the texts by Stepannof and Pfleiderer may be consulted for the equations", "A comprehensive series of papers....was given during a ....Seminar ant should be consulted." My advice? Don't waste your money, there are better books.