"All chapters end with a very useful list of additional topics and suggestions for further reading. The book also contains an appendix on set theory and topology, another one on measure theory . The book is carefully written and provides an interesting introduction to functional analysis with a wealth of both classical and more recent applications." (Michael M. Neumann, Mathematical Reviews, July, 2018) "This is an attractive new textbook in functional analysis, aimed at . graduate students. the large amount of material covered in this book . as well its overall readability, makes it useful as a reference as well as a potential graduate textbook.

If you like functional analysis, teach it, or use it in your work, this book certainly merits a careful look." (Mark Hunacek, MAA Reviews, January, 2018). "The present book is different from the usual textbooks on functional analysis: it does not only cover the basic material, but also a number of advanced topics which cannot be found in many other books on the subject. The text is suitable for self-study as well as for the preparation of lectures and seminars. this is a highly recommendable book for students and researchers alike who are interested in functional analysis and its broad applications." (Jan-David Hardtke, zbMATH 1387.46001, 2018).