From the reviews:

“The book under review provides a wide overview on the so-called soliton equations … . the book contains many topics that experts will find interesting, it is well organized and is an excellent research monograph on soliton equations. … it is accessible to a wide range of readers, from the experts in the field, to researchers who are interested in nonlinear evolution equations and PhD students who would like to learn more about this field.” (A. Yoshioka, Il Nuovo Saggiatore, Vol. 29 (5-6), 2013)

“Will be of great use to anybody who is interested in the AKNS method … . The bibliographic remarks given at the end of each section are quite useful if one wants to be oriented in the existing trends of the theory. … succeeded in bringing together different approaches while keeping the main focus on Recursion Operators. … It should be mentioned that the book is written in a reader-friendly way … . recommended to PhD students who want to learn more about the subject.” (Giuseppe Marmo, Bulletin of the London Mathematical Society, Vol. 44, 2012)

“This is a book on integrable partial differential equations. … scope of this book is large. It is a reference book. It can serve as an advance graduate textbook. … A signal feature of this book is the number of references, allowing one to review and study other examples and related aspects. … Overall, this work is impressive in what it covers and is of value to students and researchers in this area.” (D. J. Kaup, Bulletin of the London Mathematical Society, December, 2009)

„This monograph aims to discuss about the inverse scattering transform and the bi-Hamiltonian theory of soliton equations in both analytical and geometric approaches. … The book is well organized and clearly written. … The interested readers … can easily find various relevant theories and their references. It is an excellent researchmonograph summarizing and evaluating our growing body of research on soliton theory and integrable Hamiltonian systems.“ (Ma Wen-Xiu, Zentralblatt MATH, Vol. 1167, 2009)

„The book under review is divided into two parts. … devoted to the recollection of many by-now classical results concerning the application of spectral methods to integrable Hamiltonian hierarchies. … The two parts are written with the intention of being understandable to nonspecialists in the field and are self-contained. Each chapter ends with a rich bibliographical review which emphasizes the contribution of the authors to the field.“ (Simonetta Abenda, Mathematical Reviews, Issue 2009 m)