Shield of Stars (The Shield, Sword, and Crown)

This book is about Weasel, a boy of 14 years old. The time seems to be in the medieval times. The boy used to be a thief until he pickpockets a justice and became his clerk. The justice starts a plot against the second in command of the kingdom and he gets caught. Weasel has to find help to help his justice and he goes through a long journey to find the Falcon, a bandit, that is the last hope to free the justice. In the way he finds Arisa and they set off to find the falcon and save the justice.