If you're looking for a single definitive work on WWII US Paratroopers and have the coin get "Geronimo!". There are a handful of others, Osprey has a couple that are good. Windrow & Hawkins has "The US GI in Color Photographs" or something like that. It covers all army uniforms during WWII. "America's Finest" is a little known title, but a very good one. There are many.