The Martha Heasley Cox Center for Steinbeck Studies at San Jose State University has gathered just about everything there is to know about Steinbeck and his work. This is an excellent place to start your research.
Headquartered in the writer's hometown of Salinas, California, the National Steinbeck Center offers a wealth of authoritative information about the man and his work. It also has information about events and festivals related to all things Steinbeck.
The Nobel Prize web archive has Steinbeck's acceptance speech, presentation speech, a bibliography and other useful resources about his career.
The county where Steinbeck grew up and set many of his books has compiled useful resources on their native son, especially for visitors interested in Steinbeck country. The site has a timeline of Steinbeck's life, historical information and maps that let you trace the various places the author lived in or wrote about.
Created for a PBS documentary on the Dust Bowl, this site has timelines and special features that help you place the historical events that frame Steinbeck's work.
Steinbeck visited the Arvin Federal Government Camp while researching The Grapes of Wrath. The camp, which appears in the book as Weedpatch Camp, is still used as a migrant camp today. Many of the structures Steinbeck saw still exist. This site has fascinating history, photos and interviews of the camp and people who lived there.
Despite his contribution to American literature, John Steinbeck is one of the most frequently challenged authors. This BBC site helps explain why some books are targeted for censorship, and gives examples of notable book bans.