This book serves as a comprehensive technical manual for mastering Apple's ResEdit utility within the System 7 and 7.1 environments. Authors Carolyn Strange and Peter Alley provide a structured, task-oriented framework designed to transition users from basic resource editing concepts to advanced system customization techniques. By integrating practical exercises with the included software, the text functions as both a tutorial and a reference guide for Macintosh power users and developers.

Experts and contemporary users of the era identified this as the definitive resource for navigating the complexities of the Macintosh resource editor. The text is noted for its accessible, step-by-step pedagogical approach which effectively demystified system-level software modification for non-programmers.