"For the most part, Steinbeck who grew up with three sisters, had a happy childhood. He was shy, but smart, and formed an early appreciation for the land, and in particular California's Salinas Valley," according to bio.com. In 1919 he enrolled in Stanford Univ., but after six years of drifting in and out of school he went left for New York City to be a free lance writer.
His writing dreams in New York soon failed and he moved back to California. Steinbeck eventually went on to write professionally. "A collection of short stories, The Pastures of Heaven (1932), contained vivid descriptions of rural (farm) life among the "unfinished children of nature" in his native California valley. His second novel, To a God Unknown (1933), was his strongest statement about man's relationship to the land. With Tortilla Flat (1935) Steinbeck received critical and popular success; there are many critics who consider it his most artistically satisfying ." This information was found at notablebiographies.com.
In 1939 he published what most consider his best novel, The Grapes of Wrath. At it's best the novel sold 10,000 copies per week and in 1940 it won the Pulitzer Prize.