I can't see your comment, but my email told me what it said. Squad 18 actually became Raining Fire, but Ive recently been considering changing it back. I'm not totally certain I will, but I don't like the title right now, so I'm considering either Squad 18 or The Dragon Squad. Also, here are a few other dragon books I think you'd like:
Rise of the Vengeful Dragon by @KatrinHollister (of WindCaster fame)
Calathus (this one's kind of cheating, because it's not specifically dragons... It's magus...) by @LadyLucia
And then another cheating thing... Dragons and Princes by @7Bloodfire. It's technically not about Dragons, but I think you'd enjoy it.
Also, just as a side note, I've got two Raining Fire sequels in the works. Book two is being written. I'm only on the fourth chapter (major writer's block, bleh), but it should be finished by next year. I think.
Also, if you go onto the Fantasy club and start a thread about dragon books, then you will ABSOLUTELY get a lot of suggestions.