The work of American artist Louis M. Glackens (1866–1933) is often relegated to an aside within the narrative of his younger brother, artist William J. Glackens (1870–1938). Unlike his brother, Louis Glackens chose to give his interpretation of reality through fairy tales, in which the absurdity of life was captured through economy of line and an abundance of wit. For over 20 years, Louis Glackens worked as an illustrator for the satirical weekly Puck, the first widely circulated humor magazine in the United States. Following his tenure there, Glackens became one of the first cartoon animators in the burgeoning film industry of the 1910s, creating characters for production houses such as Bray, Pathé and Sullivan Studios. Until now, his vast contribution to the history of cartoons has remained largely unexplored. This monograph reevaluates Louis Glackens’ cultural contributions through a wealth of illustrations.