A Barnstormer in Oz seems to me to be an exercise in explaining the wonders of Oz in scientific terms. Or, at least as close to scientific as you can get in a world of magical events that defy explanation. Farmer has done an excellent job of that. His narrative also includes action sequences which serve to enliven the tale and create suspense, so that it's not just one long treatise. The dual purpose of the text therefore feels a little disjointed, as though explanations must be interrupted for something interesting to happen, and vice versa. I enjoyed Farmer's perspective, but was not much caught up in the action. The subplot of what would happen if Americans invaded Oz was much more fascinating to me than the eventual defeat of the evil Erakna. The resolution of this plot seemed rather protracted, and the climactic scene was rather confusing to read. I found I was spending more time trying to picture what Farmer was describing, than feeling the suspense and excitement of the altercation. This is an interesting book, but recommended only for hardcore fans of the Land of Oz.