Sinclair Lewis: Sinclair Lewis a notable American novelist and social critic contributed several stories to the magazine. His works often explored themes related to small-town life and social conformity. Upton Sinclair: Upton Sinclair known for his muckraking novels and social activism published pieces in Everybody''s Magazine. His stories often addressed social and political issues of the early 20th century. O. Henry: The renowned short story writer O. Henry known for his clever and often humorous tales contributed some of his works to the magazine. His stories frequently featured unexpected twists and turns. Stephen Crane: Stephen Crane the author of The Red Badge of Courage also wrote stories for Everybody''s Magazine. His writings often delved into themes of war and human nature. Jack London: Jack London famous for adventure and naturalistic fiction had some of his stories published in the magazine. His tales often explored the challenges of survival in harsh environments. Mary Roberts Rinehart: Mary Roberts Rinehart a popular mystery writer contributed stories to the magazine. Her works often featured suspenseful plots and strong female characters. Everybody''s Magazine provided a platform for many prominent authors of the time to reach a broad readership. It played a role in shaping American literary and cultural trends during the early 20th century. Readers could find a wide variety of fiction and non-fiction pieces making it a popular publication for entertainment and information.