both have considerable experience of working with families as music  therapists. Music therapy with family work and child protection has been evolving over the last 25 years, although the published research and clinical litera­ture on this topic remains sparse. The ACPI addresses this gap in the theo­reti­cal, research and practice  literature. Its strength lies in its capacity to function as an assess­ment tool in its own right (i.e. determining parentchild interactions for the pur­poses of child protection), as well as an assess­ment to guide further treatment with the family. The assessment is aimed at any family experiencing difficul­ties with communication, interaction or attachment behaviours; more specifically it is best used with children aged 5-12. APCI provide insights into the nonverbal communication, mutual attunement, and attachment patterns of the  family and specifically the parent’s ability to respond to the emotional needs of the child. The purpose of the book is to offer knowledge and understanding of the APCI methods in an assessment setting. Throughout the book, information will be offered on how to document the effects of the APCI, understand and interpret the results and find a base of knowledge relating to attachment and family inter­actions/­dynamics. To become a recognised and trained APCI assessor, music therapists are required to attend an official course. However, the APCI approach has clinical value that can inspire any therapist working  with families on nonverbal communication also without being certified.