'This meticulously researched volume is the first book to review the extensive jurisprudence and reporting of the UN Working Group on Arbitrary Detention since its creation in 1991. Authored by Jared Genser, one of the leading human rights lawyers in the world and someone who I had the pleasure of working with on many of his most challenging cases during my time as High Commissioner, the book is written to be highly accessible even for those without legal background. Importantly, Genser weaves into the narrative his experiences having successfully taken dozens of cases to the Working Group over his career, explaining how he has combined its opinions with focused political and public relations advocacy to secure the release of his clients from prison. This rare combination of serious scholarship with real world application is as powerful as it is inspiring, making this book a must read for anyone wanting to secure the release of political prisoners today.' Prince Zeid Ra'ad Al Hussein, UN High Commissioner for Human Rights (2014–2018)