A young dwarven boy in a family of shipwrights goes on an adventure across the sea. The ship's captain takes him to his destination and introduces him to an inn(?) run by his wife and then leaves to sail again. The boy makes friends at this inn(?) including a young girl whose mother is a "queen of thieves". I'm not sure of the other details but its a kids/teens book that came out more than 6 years ago. This just popped in my head and its killing me cause the series was still ongoing when I forgot... Please help Also, the boy is given very accurate tools as a gift from his father, a watch and a ruler. Both are special as they a very precise and have some relation to the dwarven kingdom.