Editors’ Introduction: Detention, Prison, and Knowledge Translation in Canada and Beyond by Stephanie J. Silverman and Sharry Aiken   Immigration detention refers to the law, policy, and practice of incarcerating asylum seekers and other migrants to wait for a resolution in an irregularity of their immigration status. The medical literature is conclusive that even short periods of detention cause irreparable damage to the health of men, women, and children in Canada and abroad. Sometimes referred to as administrative detention, between 8,000 – 9,000 people enter Canadian immigration detention every year. While the majority of detainees are released with 48 hours, a substantial minority are held for upwards of 40 days. The “low-risk” detainees are incarcerated in dedicated facilities called immigration holding centres (IHCs), but 16 – 20%, or the so-called “high risk” population, are sent to provincial correctional centres where they live under the same restrictive regime as prisoners convicted of criminal offences, including wearing orange jumpsuits and becoming subject to regular strip searches. While the Immigration and Refugee Protection Act (IRPA) legalized detention, policy takes up and makes real the everyday rules and regulations of running the complex detention system: a complex web of internally-issued guidance, memos, regulations, and Ministerial Directives and Instructions whose development takes place mostly out of public sight. Immigration detention cost Canadian taxpayers about $171 million last fiscal year, and this does not include the costs of flying deportees to other countries. These posts represent a collective effort to illuminate and analyze different aspects of this hybrid policy tool. The contributions point to new ways of understanding the place of detention in Canadian law, policy, and society. Springing from the De-Carceral Futures workshop that took place last May at Queen’s University, the contributions are ‘knowledge translation’ exchanges between a scholar and a student. In other words, the scholar invited the student to rewrite their research for a policy audience. The students attended a “How To” workshop organized by Trinity College research librarian Courtney Lundrigan in September 2019. The rest of this introduction is devoted to sketching the broad strokes of immigration detention policy in Canada. The IRPA provides the framework legislation that sets out the principles for when a migrant can be detained on administrative grounds in Canada. Similar to American, Australian, and British detention laws, the IRPA neglected to prescribe an upper time...