I read this book in maybe 1978. Black and white Illustrations with hidden objects throughout, like a giraffe under a man’s hat, etc. A boy runs away from home and befriends a man who sells donuts from a cart on the street. The donut salesman falls in love with a woman who has a pretzel cart and this makes the runaway boy jealous. Then a bull escapes from a pet store and runs into a giant tank of coffee, which the boy is sure to drown in as he gets trapped in a basement filling with coffee. The donut salesman saves the boy by dumping all his donuts in the coffee. The boys goes home at the end.