About The Book Percival is a puppy who, because it doesn’t know any better, poops on your pillow. Your mind is like that too. This book teaches children how to lovingly train them both.What happens if you don't take the time to train your new puppy? Things can go very badly! What happens if you don't take the time to train your own mind? Things can go even worse! This is the story of Percival the puppy and his housetraining. Learn alongside Percival how to juggle your emotions and distractions and find inner peace.