"The authors of this book intend to familiarize the reader with the basic concepts, principles, and methods of analysis and to ease access to more advanced topics. ... Every section of the book ends with exercises ... and every chapter of the book ends with a section of notes and remarks that provides historical information and supplementary material devoted to a better understanding of the present state of real analysis. I hope that this book achieves its mission." (Mansoor Saburov, Mathematical Reviews, January, 2016) "This book is a classical textbook on the theory of one variable real functions. ... The book is carefully written, with rigorous proofs and a sufficient number of problems, both solved and unsolved. ... The book goes under the surface of the topic and it is aimed in the first place to students of science ... ." (Vladimir Janis, zbMATH 1317.26001, 2015)