An extension of the revolutionary Little Blue Books series, the Big Blue Books were introduced by publisher E. Haldeman-Julius in the 1920s to accommodate longer, more in-depth texts. While the Little Blue Books delivered concise, pocket-sized ideas to the masses, the Big Blue Books provided space for full-length essays, novels, and treatises on philosophy, science, literature, politics, and freethought. Like their smaller counterparts, these volumes were rooted in Haldeman-Julius’s mission to make affordable, accessible education available to working-class readers. Often radical, secular, and reform-minded in content, the Big Blue Books reflect a unique moment in American publishing—where ideas were democratized through print, one inexpensive booklet at a time.