Cruikshank (co-founder of a Boston communications consulting firm) and Sicilia (business history, U. of Maryland) tell the inspiring model business tale based upon interviews and archival sources of how an "improbable company" maintained its values and competitive edge through economic downturns, boom periods, and against global competitors to emerge as the nations's sole surviving independent diesel engine producer, as well as a key contributor to the quality of life in Columbus, Indiana. Annotation c. by Book News, Inc., Portland, Or.