Rio Grande High-Side Gondolas is a must for railfans and modelers interested in narrow gauge rolling stock. In spite of the author’s quote in the introduction as “a brief, incomplete history,” this book is anything but. Dr. Rhine has chronicled these cars for decades and this is a detailed study of the Rio Grande’s narrow gauge highside gondolas. The book traces all the major classes of cars, from introduction to the railroad, through the many variants and permutations of the car type, to the end of their service lives. These cars formed the backbone of the coal, mineral, and loose material transport and in so doing, had long and productive lives on the line with many examples still extant, including some in regular service as passenger cars on tourist and museum railroads.