The period 1907–1913 marks a crucial transitional moment in American cinema. As moving picture shows changed from mere novelty to an increasingly popular entertainment, fledgling studios responded with longer running times and more complex storytelling. A growing trade press and changing production procedures also influenced filmmaking. In Early American Cinema in Transition, Charlie Keil looks at a broad cross-section of fiction films to examine the formal changes in cinema of this period and the ways that filmmakers developed narrative techniques to suit the fifteen-minute, one-reel format. Keil outlines the kinds of narratives that proved most suitable for a single reel’s duration, the particular demands that time and space exerted on this early form of film narration, and the ways filmmakers employed the unique features of a primarily visual medium to craft stories that would appeal to an audience numbering in the millions. He underscores his analysis with a detailed look at six films: The Boy Detective; The Forgotten Watch; Rose O’Salem-Town; Cupid’s Monkey Wrench; Belle Boyd, A Confederate Spy; and Suspense.