The Research Handbook on the Ombudsman has been published by Edwar Elgar Ed. This book was edited by two professors, Marc Hertogh, Professor of Socio-Legal Studies, University of Groningen, the Netherlands and Richard Kirkham, Senior Lecturer in Public Law, University of Sheffield, UK. They both had invited a group of professors and experts on Ombudsman to write about a variety of experiences around the world.

Traditionally, research on the ombudsman has been conducted from a purely prescriptive or (legal) descriptive perspective, mainly focusing on the ombudsman ‘in the books’. By contrast, this book illustrates how empirical research may contribute to a better understanding of the ombudsman ‘in action’. It uses new empirical studies and competing theoretical explanations to critically examine important aspects of the ombudsman’s work. The Research Handbook is organized in to four parts: fundamentals of the ombudsman; the evolution of the ombudsman; evaluation of the ombudsman; and the ombudsman office and profession. Featuring case studies from Europe, Canada, Asia, Africa, Latin America and Australia, chapters provide a comprehensive global perspective on the issues at hand.

This unique Research Handbook will be of great value to researchers in the fields of public law, socio-legal studies and alternative dispute resolution who have an interest in the ombudsman. It will also be a valuable resource for policymakers and practitioners, particularly those working within ombudsman offices.

 The author was in charge of the chapter 11 about the Latin American Ombudsman. After two years working on that, you can find it in this link. You can also obtain the chapters separately.
Also you can find it in e-books.

In the chapter 11, with the title: "The Transposition of the Ombudsman Model to the Human Rights Domain: Its Role as a Policy Entrepreneur", author links theory of public policy, human rights and my experience as National Deputy Ombudsman for Public Utilities and Environment in the National Ombudman Office where he worked several years. In the author's perspective, one of the key adaptations of the Ibearoamerican Ombdusman was the assumption of the policy entrepreneur role for public policy issues in the agenda-setting process, instead of only deal with cases and complains from citizens.