Meet Mattis, a K9 police dog who loves helping people and fighting crime alongside his partner, Officer Mark. Learn about Mattis's day as he follows scent trails, tracks down missing items, and performs police work. Find out why so many have fallen in love with one of America's fluffiest heroes in t...

Meet Mattis, a K9 police dog who loves helping people and fighting crime alongside his partner, Officer Mark. Learn about Mattis's day as he follows scent trails, tracks down missing items, and performs police work. Find out why so many have fallen in love with one of America's fluffiest heroes in this fun story based on Mattis's real-life work!