A simple enough storyline: a bus with a variety of passengers (from all walks of life) gets mired in the Californian hills, with bad weather threatening.
Yet Steinbeck's uncanny facility for clear characterisations (something that many of his modern-day counterparts would do well to copy) brings life to these names on the pages -- Camille, the voluptuous dancer, and Ernest, the travelling salesman, Mildred the learned girl, and Juan the almost "noble savage" who drives the bus, and indeed the story.
Many reviewers would try to see this book as a microcosm of society's frailties, and yet Steinbeck pulls the threads of this yarn together in such a way to present a colourful, entertaining tale.
A treat for newcomers and Steinbeck fans alike, providing another insight into the true America of the 1940's.