Despite being a guidebook for a long deprecated operating system, "Danny Goodman's Macintosh Handbook" remains one of the finest examples of how such guides should be presented. Featuring double page spreads with full-size screenshots, it served as a visual guide to how the Macintosh graphical user interface worked.
Today, all desktop and mobile computers feature GUIs. Most computer guidebooks however, still reward the readers with a wall of text filled with jargon.