I recently finished a story entitled Kenny and the Dragon by Tony DiTerlizzi.  It is a delightful story, with Kenny Rabbit, its likable main character as the hero.  He makes a best friend in Grahame, a friendly dragon, but things start to get difficult when George, the kindly bookshop owner turns out to be a retired knight, and is recruited by the king to kill the dragon.

I won't give the ending away, but I will say that it's fun, and filled with twists that folks of all ages will enjoy! 

This is a book I heartily recommend.