This book is a valuable addition to any collection of vintage gasoline engines. It provides a detailed and informative guide to the operation and use of model gasoline engines, with a focus on design and engineering. The book is a first edition, collector's edition, and limited edition international edition published in 1941 by D. Appleton-Centry Company. The book is signed by Dm Campbell and features 241 pages of illustrations and detailed descriptions of model gasoline engines. It is suitable for young adults and adults who are interested in the history and development of gasoline engines. This book is a must-have for anyone who is interested in the topic of design and engineering, and is a great conversation starter for collectors and enthusiasts.