Meet Petri, the beloved purple monkey who lives with his friends in Kilkea Castle, Ireland. In this first book of the popular series, Petri decides that as he lives in a castle he must be a King, and Kings order their subjects around. Unfortunately for Petri, his friends aren't so impressed with their new "royal" friend. As a result, Petri finds himself sad and alone until he realizes that royal titles and trappings don't matter. What really matters is being kind to his friends.

This book series is inspired by the true story of the brave little monkey who saved the day at Kilkea Castle, in Kildare, Ireland.