This is an essential book for both clinicians and researchers. There are many books on borderline personality disorder but this is the only one which comprehensively integrates current understanding of the disorder with empirical evidence and systematically links it with daily clinical practice. In the first edition of this book John Gunderson provided an exemplary clinical guide to the treatment of the disorder. In this up-dated edition, he excels. As a master clinician, he draws on a lifetime's experience to answer common but complex clinical questions; as a master researcher, he assesses the relevance of research to daily practice; and as an authority he brings balance, clarity and scholarship to his discussion of competing approaches to treatment. This is an exceptional book which should be read by every practitioner treating patients with borderline personality disorder. Prof Anthony W Bateman M.A., FRCPsych, Consultant Psychiatrist and Psychotherapist, Halliwick Unit, Barnet, Enfield, and Haringey Mental Health Trust; Visiting Professor University College, London.