Mick Cooper's Essential Research Findings in Counselling and Psychotherapy: The Facts are Friendly will give you a taste of the sort of material that can be found in The Heart and Soul of Change series. The second edition is packed with the latest research that shows you what is really going in the field of mental health. The editors have done a great job in distilling the research findings into something highly readable and thought-provoking. Their recommendations have important implications for how mental healthcare professionals work. This book appears relatively expensive but for the amount of information and advice it contains it represents excellent value for money, especially when compared to what you might spend on training and publications. I believe that therapists and therapeutic organisations cannot afford to be without this knowledge. Barry Duncan's book On Becoming a Better Therapist will give you a flavour of how this book can be put to practical use.
I found this book to be a valuable step forward from the first edition. The summary of common factors research is useful. I especially liked the chapter on client factors, which are probably much the most important variables in our work.