During the months of May to September, Prof. Dr. Sérgio Torres Teixeira taught a discipline called “Constitutional Guaranties of the Process and Procedural Instrumentality” (which is also the name of this book) in the Post-Graduate Program of the Federal University of Pernambuco; one of the first classes entirely online in regard to COVID-19 safety measures. Despite the distance, all classmates were remarkably close in the intellectual purpose of learning and develop the law. Their researches, discussions and enthusiasm gave birth to this book, which delves deeply in important matters regarding constitutional and procedural law. It is constituted of 12 carefully written articles concerning such matters as the non-avoidance of judicial review, procedural equality in national and international law, international juridical cooperation and the effectiveness of transnational adjudication, the right to a natural judge in arbitration, social participation in administrative procedures, preventive measures in administrative procedures, among other themes that can be seen in the summary. It is a book that encapsulate different views and perspectives about such fundamental matters, intertwining different areas of law, abundantly revealing the plurality of though that sets the tone to this valuable initiative. It is by definition the work of a collectivity, that by mutual criticism made possible this academic landmark to all participants, showing the active and curious spirit of the minds cultivated in the Federal University of Pernambuco, specially concerning the researches related to procedural justice, access to justice and instrumentality. In this sense, is a work that reflects the prominent procedural issues of its time.