I brought this book ( volume 2 also as well ) because of its " fame ", but when I read it, it has several draw backs. First, may be the original vesion is in German, so even with good translation, it seem does not fit in the usual English style we get used to .Also the topics it choose is too few and also the area covered is too narrow and not well co-ordinated. For example, the whole volumme I is almost dedicated to Calculus of variation only. In volume 2, the whole book is dedicted to differentiation equations. But that is not the greatest drawback. The most bad point is that the book just presents formulae after formulae, equations after equations, without giving examples of how to use it,and also no exercise for me to practice. Compared the the timeless classic " A course of mordern analysis " by Whittaker and Watson, it is definitely at a lower level. This book cannot be described as " classics ".