Tractor Mac is hard at work in the field one day when his engine starts to make a funny noise. It doesn't sound good, and it doesn't feel very good, either. Tractor Mac is scared that he has to take a trip to Dr. Lou at the tractor hospital, but with the help of his animal friends and some other machines who have stopped in for a tune-up, he learns that going to the doctor doesn't have to be scary at all. Billy Steers is an author, illustrator, and commercial pilot. In addition to the Tractor Mac series, he has worked on forty other children's books. Mr. Steers raised horses and sheep on the farm where he grew up in Connecticut. Married with three sons, he still lives in Connecticut.