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"This is a great contribution to the practice and science of coaching… This book celebrates the exciting journey of discovery that workplace coaching scholars have achieved to date and on the same breath highlights areas that need to be further addressed." — Dr Gil Bozer

"This book will be an instant classic! It can advance coaching research in many ways. Not only does it provide a comprehensive review of the literature to date, it also reviews this literature in an open, critical, courageous, and creative way... This book should be on the reading list for everyone who is professionally involved in coaching in any way." — Dr Tim Theeboom

"Thank you for the opportunity to read your new book which builds bridges and at the same time offers both interesting controversies and new impulses. I love the way you write: well understandable; reflective; tying all these loose ends in coaching research; and interesting for both practitioners and researchers." — Professor Patrizia Ianiro-Dahm

"I found this book extremely interesting, very well written and actually a pleasure to read. I loved the vignettes at the beginning of each chapter: they fit very well. I also appreciated that every chapter starts with the controversies – as a way to acknowledge the issues even before the successes of coaching, which is rare compared to a lot of the uncritical enthusiasm that coaching often elicits." — Professor Silvia Dello Russo

"I like that this book provides an eminently clear expression of the factors that contribute to quality in quantitative research in coaching and overviews the intricacies of research in a way that is accessible and should increase the research literacy of readers. What I especially appreciated was the view that good quality coaching research is bloody hard to do; something that (I suspect) is not so well appreciated… So much of what you say is not just relevant for practitioners and the purchasers of coaching, but also for researchers, who can sometimes become blinkered in their work and benefit from helpful reminders." — Dr Gordon Spence

"The author has captured a broad and comprehensive review of the research literature on what works, for whom, and under which circumstances regarding executive and workplace coaching. Combining quantitative research and practice-based evidence, this will be an inspiring text for both academics and professional coaching practitioners." – Dr M. Josefina Peláez, Universitat Jaume I, Spain

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'This is a great contribution to the practice and science of coaching… This book celebrates the exciting journey of discovery that workplace coaching scholars have achieved to date and on the same breath highlights areas that need to be further addressed.' — Dr Gil Bozer

'This book will be an instant classic! It can advance coaching research in many ways. Not only does it provide a comprehensive review of the literature to date, it also reviews this literature in an open, critical, courageous, and creative way... This book should be on the reading list for everyone who is professionally involved in coaching in any way.' — Dr Tim Theeboom

'Thank you for the opportunity to read your new book which builds bridges and at the same time offers both interesting controversies and new impulses. I love the way you write: well understandable; reflective; tying all these loose ends in coaching research; and interesting for both practitioners and researchers.' — Professor Patrizia Ianiro-Dahm

'I found this book extremely interesting, very well written and actually a pleasure to read. I loved the vignettes at the beginning of each chapter: they fit very well. I also appreciated that every chapter starts with the controversies – as a way to acknowledge the issues even before the successes of coaching, which is rare compared to a lot of the uncritical enthusiasm that coaching often elicits.' — Professor Silvia Dello Russo

'I like that this book provides an eminently clear expression of the factors that contribute to quality in quantitative research in coaching and overviews the intricacies of research in a way that is accessible and should increase the research literacy of readers. What I especially appreciated was the view that good quality coaching research is bloody hard to do; something that (I suspect) is not so well appreciated… So much of what you say is not just relevant for practitioners and the purchasers of coaching, but also for researchers, who can sometimes become blinkered in their work and benefit from helpful reminders.' — Dr Gordon Spence

'This book presents the entire spectrum of empirical coaching research to date and depicts an almost complete status quo of coaching research.

The book is therefore suitable for researchers to identify the gaps that coaching research has not yet addressed and for practitioners of any school and any methodological background who either want to read up on the subject of effectiveness or are motivated to gain inspiration on how to enrich their coaching practice with evidence-based elements and "magic ingredients" that help their clients the most.

I am convinced that this book will be a future standard reference for coaching researchers and practitioners interested in evidence-based coaching and, despite the title, definitely is not limited to executive coaching.' – Dr Katharina Ebner, Senior Lecturer, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany; psychologist and career coach

'The author has captured a broad and comprehensive review of the research literature on what works, for whom, and under which circumstances regarding executive and workplace coaching. Combining quantitative research and practice-based evidence, this will be an inspiring text for both academics and professional coaching practitioners.' – Dr M. Josefina Peláez, Universitat Jaume I, Spain

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