"Drawing from the author's wealth of practical experience, this book delves into contemporary issues like detention during pandemics and counter-terrorism measures. Its approach to the subject of arbitrary detention sets it apart, making it a unique contribution to the field." Elna teinerte, UN Subcommittee on the Prevention of Torture and former Chair Rapporteur of the UN Working Group on Arbitrary Detention "This is a fresh reminder that the international community needs to do more to counter arbitrary detention. Ferstman's rigorous analysis determines with clarity and persuasiveness under what precise conditions deprivation of freedom is warranted and when it is a serious violation of universally recognized standards. This book is an enormous contribution to the struggle to uphold those principles, to denounce aberrant recourse to prolonged or widespread detention without trial, and to devise specific and effective remedies in international and in domestic law to preserve the fundamental right to liberty." Juan E. Mendez, American University Washington College of Law and former UN Special Rapporteur on Torture