Thick, deadly, that curtain of purple gas stretched along our border from Maine to the Great Lakes. What did it hide? What gigantic war scheme was the enemy preparing behind it? The Fate of America depended upon knowing these answers in time - and grimly Ayres vowed to find out, flying a one-man patrol against the greatest military coup ever planned!
Used availability for Robert Sidney Bowen's Purple Tornado
July 2017 : USA Paperback
Title: Dusty Ayres and his Battle Birds #3: The Purple Tornado (Volume 3)
Author(s): Robert Sidney Bowen
ISBN: 1-61827-288-8 / 978-1-61827-288-1 (USA edition)
Publisher: Altus Press