Megan Bradley is Associate Professor and William Dawson Scholar in Political Science and International Development Studies at McGill University. She is the author of several books including Refugee Repatriation: Justice, Responsibility and Redress (2013) and The International Organization for Migration: Commitments, Challenges, Complexities (2020), and co-editor of Refugees' Roles in Resolving Displacement and Building Peace: Beyond Beneficiaries (2019). Since 2021, she has served as co-editor of the Journal of Refugee Studies. Cathryn Costello is Professor of Fundamental Rights, and Co-Director of the Centre for Fundamental Rights at the Hertie School, Berlin and Andrew W. Mellon Professor in International Refugee and Migration Law at the Refugee Studies Centre, University of Oxford. She has previously published The Human Rights of Migrants and Refugees in European Law (2015) and is co-editor of the Oxford Handbook of International Refugee Law (2021). Angela Sherwood is a Lecturer in Law at Queen Mary University of London (QMUL) and Co-Director for the QMUL Centre for Climate Crime and Climate Justice. Angela's work has appeared in the Journal of Refugee Studies and in several edited volumes on themes of international migration, displacement, and state crime.

• Introduction; 1. IOM unbound? Obligations and accountability of the international organization for migration in an era of expansion Megan Bradley, Cathryn Costello and Angela Sherwood; 2. Who and what is IOM for? The evolution of IOM's mandate, policies, and obligations Megan Bradley; 3. The (Possible) responsibility of IOM under international law Jan Klabbers; 4. An assessment of IOM'S human rights obligations and accountability mechanisms Stian Øby Johansen; 5. A human rights due diligence policy for IOM? Helmut Philipp Aust and Lena Riemer; 6. The legal relationship between the UN and IOM: what has changed since the 2016 cooperation agreement? Miriam Cullen; 7. Crisis and change at IOM: critical juncture, precedents, and task expansion Christian Kreuder-Sonnen and Philip M. Tantow; 8. How IOM reshaped its obligations on climate change and migration Nina Hall; 9. the international organization for migration as a data entrepreneur: the displacement tracking matrix and data responsibility deficits Anne Koch; 10. IOM and ethical labor recruitment Janie Chuang; 11. The international organization for migration in humanitarian scenarios Geoff Gilbert; 12. IOM's engagement with the UN guiding principles on internal displacement Bríd Ní Ghráinne and Ben Hudson; 13. IOM's immigration detention practices and policies: human rights, positive obligations and humanitarian duties Angela Sherwood, Isabelle Lemay and Cathryn Costello; 14. IOM and 'Assisted Voluntary Return': responsibility for disguised deportations? Jean-Pierre Gauci; 15. Holding IOM to account: the role of international human rights advocacy NGOs Angela Sherwood and Megan Bradley.

'For me, the IOM was always an international organization lurking in the background, always part of the crowd but never really big or interesting enough to warrant too much attention. Over the last decade it has accumulated greater status - alongside considerable mystery regarding its history, accomplishments, ambitions, legal obligations, and moral compass. Will it become another international organization prepared to do the bidding of the major powers and try and contain migration?  Or will it become a needed voice in the fight for the rights and protection of the growing number of global migrants? This necessary volume puts into tension the practice and ethics, the retrospective and prospective, in fascinating ways.' Michael Barnett, University Professor of International Affairs and Political Science, George Washington University

Megan Bradley is Associate Professor and William Dawson Scholar in Political Science and International Development Studies at McGill University. She is the author of several books including Refugee Repatriation: Justice, Responsibility and Redress (2013) and The International Organization for Migration: Commitments, Challenges, Complexities (2020), and co-editor of Refugees' Roles in Resolving Displacement and Building Peace: Beyond Beneficiaries (2019). Since 2021, she has served as co-editor of the Journal of Refugee Studies. Cathryn Costello is Professor of Fundamental Rights, and Co-Director of the Centre for Fundamental Rights at the Hertie School, Berlin and Andrew W. Mellon Professor in International Refugee and Migration Law at the Refugee Studies Centre, University of Oxford. She has previously published The Human Rights of Migrants and Refugees in European Law (2015) and is co-editor of the Oxford Handbook of International Refugee Law (2021). Angela Sherwood is a Lecturer in Law at Queen Mary University of London (QMUL) and Co-Director for the QMUL Centre for Climate Crime and Climate Justice. Angela's work has appeared in the Journal of Refugee Studies and in several edited volumes on themes of international migration, displacement, and state crime.

• Introduction; 1. IOM unbound? Obligations and accountability of the international organization for migration in an era of expansion Megan Bradley, Cathryn Costello and Angela Sherwood; 2. Who and what is IOM for? The evolution of IOM's mandate, policies, and obligations Megan Bradley; 3. The (Possible) responsibility of IOM under international law Jan Klabbers; 4. An assessment of IOM'S human rights obligations and accountability mechanisms Stian Øby Johansen; 5. A human rights due diligence policy for IOM? Helmut Philipp Aust and Lena Riemer; 6. The legal relationship between the UN and IOM: what has changed since the 2016 cooperation agreement? Miriam Cullen; 7. Crisis and change at IOM: critical juncture, precedents, and task expansion Christian Kreuder-Sonnen and Philip M. Tantow; 8. How IOM reshaped its obligations on climate change and migration Nina Hall; 9. the international organization for migration as a data entrepreneur: the displacement tracking matrix and data responsibility deficits Anne Koch; 10. IOM and ethical labor recruitment Janie Chuang; 11. The international organization for migration in humanitarian scenarios Geoff Gilbert; 12. IOM's engagement with the UN guiding principles on internal displacement Bríd Ní Ghráinne and Ben Hudson; 13. IOM's immigration detention practices and policies: human rights, positive obligations and humanitarian duties Angela Sherwood, Isabelle Lemay and Cathryn Costello; 14. IOM and 'Assisted Voluntary Return': responsibility for disguised deportations? Jean-Pierre Gauci; 15. Holding IOM to account: the role of international human rights advocacy NGOs Angela Sherwood and Megan Bradley.

'For me, the IOM was always an international organization lurking in the background, always part of the crowd but never really big or interesting enough to warrant too much attention. Over the last decade it has accumulated greater status - alongside considerable mystery regarding its history, accomplishments, ambitions, legal obligations, and moral compass. Will it become another international organization prepared to do the bidding of the major powers and try and contain migration?  Or will it become a needed voice in the fight for the rights and protection of the growing number of global migrants? This necessary volume puts into tension the practice and ethics, the retrospective and prospective, in fascinating ways.' Michael Barnett, University Professor of International Affairs and Political Science, George Washington University

Megan Bradley is Associate Professor and William Dawson Scholar in Political Science and International Development Studies at McGill University. She is the author of several books including Refugee Repatriation: Justice, Responsibility and Redress (2013) and The International Organization for Migration: Commitments, Challenges, Complexities (2020), and co-editor of Refugees' Roles in Resolving Displacement and Building Peace: Beyond Beneficiaries (2019). Since 2021, she has served as co-editor of the Journal of Refugee Studies. Cathryn Costello is Professor of Fundamental Rights, and Co-Director of the Centre for Fundamental Rights at the Hertie School, Berlin and Andrew W. Mellon Professor in International Refugee and Migration Law at the Refugee Studies Centre, University of Oxford. She has previously published The Human Rights of Migrants and Refugees in European Law (2015) and is co-editor of the Oxford Handbook of International Refugee Law (2021). Angela Sherwood is a Lecturer in Law at Queen Mary University of London (QMUL) and Co-Director for the QMUL Centre for Climate Crime and Climate Justice. Angela's work has appeared in the Journal of Refugee Studies and in several edited volumes on themes of international migration, displacement, and state crime.

• Introduction; 1. IOM unbound? Obligations and accountability of the international organization for migration in an era of expansion Megan Bradley, Cathryn Costello and Angela Sherwood; 2. Who and what is IOM for? The evolution of IOM's mandate, policies, and obligations Megan Bradley; 3. The (Possible) responsibility of IOM under international law Jan Klabbers; 4. An assessment of IOM'S human rights obligations and accountability mechanisms Stian Øby Johansen; 5. A human rights due diligence policy for IOM? Helmut Philipp Aust and Lena Riemer; 6. The legal relationship between the UN and IOM: what has changed since the 2016 cooperation agreement? Miriam Cullen; 7. Crisis and change at IOM: critical juncture, precedents, and task expansion Christian Kreuder-Sonnen and Philip M. Tantow; 8. How IOM reshaped its obligations on climate change and migration Nina Hall; 9. the international organization for migration as a data entrepreneur: the displacement tracking matrix and data responsibility deficits Anne Koch; 10. IOM and ethical labor recruitment Janie Chuang; 11. The international organization for migration in humanitarian scenarios Geoff Gilbert; 12. IOM's engagement with the UN guiding principles on internal displacement Bríd Ní Ghráinne and Ben Hudson; 13. IOM's immigration detention practices and policies: human rights, positive obligations and humanitarian duties Angela Sherwood, Isabelle Lemay and Cathryn Costello; 14. IOM and 'Assisted Voluntary Return': responsibility for disguised deportations? Jean-Pierre Gauci; 15. Holding IOM to account: the role of international human rights advocacy NGOs Angela Sherwood and Megan Bradley.

'For me, the IOM was always an international organization lurking in the background, always part of the crowd but never really big or interesting enough to warrant too much attention. Over the last decade it has accumulated greater status - alongside considerable mystery regarding its history, accomplishments, ambitions, legal obligations, and moral compass. Will it become another international organization prepared to do the bidding of the major powers and try and contain migration?  Or will it become a needed voice in the fight for the rights and protection of the growing number of global migrants? This necessary volume puts into tension the practice and ethics, the retrospective and prospective, in fascinating ways.' Michael Barnett, University Professor of International Affairs and Political Science, George Washington University