More on Sgt. Mark Tappan Sgt. Mark Tappan is a decorated member of the Alpharetta Police Department in Alpharetta, GA. He bases this children’s book on his now retired K9 partner, Mattis, the most decorated dog in the police department. Learn more at www.mydogmattis.com.   More on Jem Umbright and Jelena Sasko of The Pet Porters Jem Umbright and Jelena Sasko are the co-founders of The Pet Porters, a company specializing in the safe transport of pets domestically and internationally by vehicle and by airplane. The company is based in Dallas, TX. Learn more at www.thepetporters.com.  Learn more about your ad choices. Visit megaphone.fm/adchoices