"All material is carefully organized and presented in a transparent manner. The text contains a large number of solved problems which illustrate well theoretical material. Each chapter concludes with a selection of exercises for independent study; hints and answers to exercises are collected in the end of the book along with a useful list of references and a subject index. ... Undoubtedly, this book is a very valuable contribution to existing texts on qualitative theory of differential equations." (Yuriy V. Rogovchenko, zbMATH, Vol. 1326.34007, 2016)