H. L. Mencken's A Book of Prefaces (1917) is a landmark collection of four essays on American culture and literature. In chapters on Theodore Dreiser, Joseph Conrad, and James Huneker, Mencken uses incisive analysis and forceful polemic to advocate for artistic independence and cosmopolitan standards. In a fourth chapter, "Puritanism as a Literary Force," Mencken denounces the stifling influence of Puritan values on William Dean Howells, Henry James, and Mark Twain, arguing that religious orthodoxy and rigid social convention have suppressed aesthetic freedom and honest expression. A Book of Prefaces provoked fierce backlash from defenders of American tradition even as it inspired a new generation and established Mencken as a bold, influential voice in literary debate. This Warbler Classics edition includes an introduction, annotations, a biographical timeline, and suggestions for further reading by William E. Cain.