The storyline was good, I'll give it that, and the world building is intriguing. However, Ammon, the main character, starts out as a simpleton and stays a simpleton. Barely any personal growth apart from that which is magically bestowed. I thought he was supposed to be 17, but he acts like he's 10. Maybe I've been spoiled by intelligent leads in the past, but this guy is beyond dense. His dragon is smarter than he is...which wouldn't normally be a problem if the gap wasn't so wide. There are some lovable characters, but this is overshadowed by writing that seems to be trying to include every 'happy ending' trope ever written. I like the story, it's unique and it's about dragon knights and dragons, one of my fave genres...but it tries way too hard to make sure everyone is 'well-equipped' in the end. (trying not to spoil the ending but lets just say by giving so much to so many, it ruins the tone of the story) Too much too soon in other words, especially if he's trying to write another book. If he does I may read it, but I was so annoyed by the ending of this one that I'm not so sure anymore.
For the age group, sure give it a try, but if your child/teen likes fantasy with smart or cunning leads that can think things through without the constant aid of magical beasts...steer clear.