This book traces the thought of Robert Grosseteste (c. 1175 - 1253), one of the pre-eminent intellectual figures of thirteenth century England, from his early works of natural philosophy (science) through to his later theological work. His legacy upon later generations is touched upon at the end, focusing on his championing by such contrasting followers as Roger Bacon and John Wyclif (and the later Lollards), who took some of his idea to places he would not have intended. Southern delves into the problems of identification of his early works and of knowing much of anything about his early life from the very fragmentary evidence available (until he begins teaching at Oxford in the 1220s). It gets especially interesting when Southern discusses the differences of his thought to that of mainstream scholasticism, and how course his education may have taken to became such an individual figure. As this book focuses on his intellectual development, there isn't so much detail of the activities his years as Bishop of Lincoln (1235 - 1253), and it isn't a biography as such. This is an excellent book that thoroughly explores the mind, as far as we can know it, of a fascinating figure.