Selling two books together:.1. Tom Swift in the Land of Wonders or The Underground Search for the Idol of Gold. This book by Victor Appleton is Volume 20 in the original Tom Swift novel series.  This is a young adult adventure novel. The lost city of Kurzon is in the Honduras where the solid gold idol is mentioned.

2. Tom Swift and his Air Scout or Uncle Sam’s Mastery of the Sky: This is written by Victor Appleton C. 1919 by Grosset and Dunlap. This is a young adult adventure novel, volume 22 in the series written in the early years of the 20^th century before WW I ended.  A time when engineers/machinists did the work themselves before mechanized assembly lines.  A hint of romance and a young inventor who goes on wild and crazy adventures.