"... <..> I travel here and there. Michigan one week, Florida the next, then maybe a hop to Coney Island for a Redhot and a ride on the Cyclone. I am what you might call a rambling man, and America is my beat. I keep an eye on certain people, and check back on them every once and again.” Source: Gwendy Button Boy by Stephen King and Richard Chizmar Context: Gwendy is making an acquaintance of Mr Farris, a middle aged black man. What does the bolded expression mean? Would it mean my area of interest? My playground? Thank you.