V. I. Keilis-Borok (1921-2013) is the founder of computational seismology and the pioneer of advance predictions of critical events in complex systems, including earthquakes, presidential elections, economic recessions, surges of unemployment, and crime waves. Among his successful advance earthquake predictions are Irpinia earthquake in Italy (1980), Loma Prieta earthquake in California (1989), Chile earthquake of 2010, Japan earthquake of 2011, and many others. V. I. Keilis-Borok developed new paradigms in the study of structure and dynamics of solid Earth. His trademark style involved exceptional organizational talent and insight that enabled him to make seemingly impossible connections between different fields of research and different groups of experts, often breaking the barriers between high theory, numerical modeling, and data analysis. His outstanding achievements are recognized by memberships in many academies and international scientific organizations, including National Academy of Sciences of the USA, Pontifical Academy of Sciences, Academia Europea, Royal Astronomical Society, and others, as well as through awards and honors, and by the respect and devotion he inspired in his friends and colleagues. This book contains his brief biography and reflections by his family, friends, and colleagues-a tribute to this truly remarkable man. Proceeds from this book will support the effort in promoting and publicizing V.I. Keilis-Borok's work.