A Knock on the Door: The Essential History of Residential Schools from the Truth and Reconciliation of Canada is edited & abridged for ease of use by the general public and secondary school students. This 296-page book consists of the TRC text of What We Have Learned: Principles of Truth and Reconciliation as well as shorter versions from TRC executive summary (Introduction, Reconciliation & Legacy chapters). This volume contains the 94 Calls to Action. It also includes a foreword by Phil Fontaine and an afterword by Aimee Craft, director of research, National Centre for Truth and Reconciliation. The book includes a map of residential schools in Canada, notes, and bibliography. It does not have an index.