This document summarizes the first section of Of Mice and Men by John Steinbeck. It introduces the characters of George and Lennie, two migrant workers during the Great Depression who travel together. George is small and quick while Lennie is large with a mental disability. They are dressed similarly in denim clothes. The section establishes their codependent relationship and hints that something could go wrong in the future based on Lennie's fixation with petting animals which has led to their deaths. It leaves the reader with a sense that trouble may be ahead for the two travelers.