The Dragonfly Delivery Company

Pirates rule the skies, robbing ships at will
They're ruthless, efficient, and surprisingly well informed. There's a rat in the Air Courier's Guild, and to catch a rat you need a rat catcher. You need Dexter and Sinister.
Up in the air and out of their depth, John and Dexter will have to watch their backs on this one. The Guild might be on their side but the captains sure aren't. They have secrets to keep, secrets that could get a man killed, and it's a long way down for those who stick their noses in where they don't belong. And their cats too, if they're not careful!
With airship battles over the English lakes, marauding vegan chefs, and the return of everyone's favourite muscle for hire, Agnes Goodenough, The Dragonfly Delivery Company is a tale of heroism and high adventure, full of fun, laughs, and the sort of steam-powered shenanigans everyone can enjoy.