This biography of a pioneering geologist represents a major contribution to the history of science in New Zealand. Best known for his discovery of the Alpine Fault on the South Island, Harold Wellman began his career in the 1930s with no formal academic training and based his work on observations of gold and coal mining, oil drilling, geophysics, and neotectonics. The first section of the book is an edited version of a memoir Wellmen wrote in his 80s, after which the biography proper takes up the saga of this iconoclast turned icon whose curiosity and aversion to preconceived ideas made him a revered mentor to many young scientists.