I like the sound of it but I think for a query letter you need to be more succinct. After the opening sentence you need something akin to the elevator pitch of no more than a sentence or two that sums up what the book is about. Then a paragraph on the basic plot and then the biography paragraph. You only need about 3-400 words so, for example, you don't need to say that the skycom inhabitants fear him because they've already said he's a monster. I must say it sounds fascinating so I hope you find your agent!
Thanks for the feedback. You know, I've tried the succinct and I've gotten much of what the first poster wanted. MORE DETAILS!!!! :)
I decided to put a little more in because the elevator pitch (Troubled teen fights prejudice and self-loathing to explore a ruined world and his own unique supernatural powers) seemed too... lacking in details. I could condense it back down again. I'm not sure. That's why I'm here! To work out all the kinks before I commit to sending it to agents.
And I thought writing a 117,000 word story was hard...