While traveling on the train to San Francisco with his cousin Olivia's owl, Nate the Great and his dog Sludge must use all of their detective skills when the owl suddenly disappears.
Discusses passenger trains, how they work, their history and inventors, how modern trains compare to early models, and what it is like to travel on them.
"The Little Engine that Could" advises how to find one's own track, handle life's ups and downs, and even face the dark tunnels that can make one frightened or sad.