There are few (if any) music therapy texts that have drawn so heavily on Mikhail Bakhtin's work. Karette Stensaeth lists other music therapists-Gary Ansdell, Mercedes Pavlicevic, Rudy Garred and Brynjulf Stige-that have used Bakhtin's ideas, yet none have engaged with his work in such detail. Furthermore, none have used his ideas so comprehensively in relation to improvisation in music therapy. So, this book is unique in its scope and depth. Stensaeth sets out her purpose clearly: '. .. to outline novel perspectives on responsiveness in music therapy improvisation that might provide a fresh conceptual framework for the broad value of active and creative music-making in therapy' (p. 3). What Stensaeth discovers and the journey she takes, comes across as powerfully personally significant. Beginning with her initial encounters with music and her discovery of music therapy, she opens a door into a philosophical field of play, and takes us on a rich, multi-layered, intimate and expansive journey. As well as viewing music therapy improvisation through Bakhtin's philosophical lenses, she uses it to embrace fundamental existential and ontological questions that may resonate with many music therapists, namely 'what is music therapy?' and 'what is your role as a music therapist?' I would describe my own approach to music therapy as having a relational focus, based on person-centred practice, as set out by Brendan McCormack and Tanya McCance (2016), and informed by psychodynamic theory. For me, improvisation is absolutely central to my practice and this can manifest in many varied ways. It rests on an embodied and relational conception of improvisation which does not always involve active music making, and so in this way differs from Stensaeth's focus on an active creative music therapy approach. This was something I had to consider as I progressed through the text. I hope that my own point of view and cultural background allows open and constructive dialogue in the Bakhtinian spirit so described. The book originates from Stensaeth's doctoral study. Therefore, it centres around research into her own music therapy practice. She begins the book by redefining core concepts in music therapy, as if setting out her music therapy room and choosing which instruments she would like to have available. Stensaeth writes from the point of view of a Norwegian-based and Norwegian-trained music therapist, steeped in that culture, thinking and practice. She firmly situates her 'active' music therapy ontology as having grown out of a particular Norwegian music therapy scene and time. Paul Nordoff and Clive Robbins are identified as core influences (p. 18) and in practice she embraces their Creative Music Therapy (2007) approach, despite pointing out that Bakhtin's existential dialogical philosophy diverges from their '. .. assumption that the client's personality is developed from within, using inner resources. .. ' (p. 19). Other influences include Ken Bruscia and Even Ruud, and these music therapy threads underpin both her approach to musi...