All nine volumes with clear archival covers on dust jackets. This is a great reference set for, you guessed it, U.S. civil aircraft, especially the obscure types you just can't dig my information on. Price is $249 plus actual cost of shipping(postage only, no handling charges). I have 1000s of aviation books available. If you are looking for a book on your Piper, Cessna, WACO, Beech, among others, just email.
