There were elements of this book that instantly appealed to me: a society of winged humans living in cities above the clouds for starters, and a mighty airship. However the opening sentence with its reference to an airbus hinted of trouble ahead. Why do people who can fly need an airbus? It soon turned out the main character, Azreal (Az) Gabrielson, a lad in his mid-teens was 'deformed' and had been born wingless, making him someone to be bullied by his class mates, however his wingless condition makes him the perfect person to travel below the clouds to interact with the non-endowed ground-dwellers, of which little seems to be known apart from the fact that they're providers of raw materials for the cloud-dwellers. The ground-dwellers are tied to a religion that promises the good will, upon death, ascend to live above the clouds as beautiful winged creatures, and there's a profitable trade in finding 'holy relics' (detritus that's fallen from the world above) and selling them to the church. The world and story arc of the ground dwellers, and their peculiar language works surprisingly well. The main characters are the Grubdollar family and their monstrosity of a machine - I pictured it in my mind as part tank, part bulldozer - Cackling Bertha.
But the story was all about Az, who was seen as "the Chosen One" in a way that reminded me of Harry Potter, but with a nicer family. By the included second book, "Pirates of the Relentless Desert" Az was soon captaining the airship while aged only 17, which I felt pushed believability a bit too far.
True, there was plenty of swash-buckling adventure, but it was the minutea that kept throwing me out of the story: why do you need airbuses or airships for that matter, when you have the gift of flight? it's not easy to clothe a winged human, yet these were all nattily dressed; grabbing someone without wings by one wrist then launching into the air (when you've got wings and you're giving them a lfft) would likely dislocate their shoulder, and how heavy a payload can a winged hman carry anyway? Presumably not something close to its own weight?
More than once I felt like closing the book and not finishing it, but I made it to the end. The author's tendancy to write short chapters helped keep me going for the 600 pages, but I was glad when it concluded, and while the author was keen to continue his adventures, I won't be pursuing further installments in this universe.