Katy, a red crawler tractor, belonged to the Highway Department of the City of Geoppolis. She was not used in winter, however, until a huge snow storm snowed in the whole city. Then Katy plowed out everyone.

"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"--

Tractor Mac loves that he is the only tractor in his farm family. Then one day, his friend Iron Dave the train brings him to a tractor dealership and shows him a whole lot full of big red tractors that look just like him. Are these tractors his real family? Tractor Mac is excited to find a place with so many familiar faces, but sad that he might have to leave the farm to be with them. Then all of the big red tractors in the lot help him to understand...

Vehicles of all sorts get angry when they are stuck behind a slow-moving tractor.

After a long day of work on the farm, Tractor is ready to relax.

When the animals and equipment at the farm need more space, Tractor Mac comes to the rescue by helping to build a barn.

Simple rhyming text describes a child's day spent riding on the tractor with Daddy at their small farm.

When a blizzard strikes town and it looks like the tree-lighting ceremony has to be cancelled this year, Tractor Mac knows just the way to save Christmas.

After seeing a plane flying through the sky, Mac the tractor decides that he wants to fly.

While Farmer Dougal is sleeping, Sheep convinces the other farm animals to take a ride on his tractor and imitate the different noises that it makes.