I have neither read the book nor used an airbrush, but I work for the company so I feel compelled to mention this book.
[img=left]http://store5.yimg.com/I/kalmbachcatalog_1764_8247980[/img=left]
How to Use an Airbrush
By Robert Downie
Learn how to achieve special airbrushing effects on a variety of plastic models. Eleven projects teach the basics of realistic finishes, camouflage, weathering, and other special effects for scale plastic modeling.
Perfect-bound softcover; 8 1/4 x 10 3/4; 96 pages; 196 color photos;
http://store.yahoo.net/kalmbachcatalog/12173.html