Possibly one of his most well-known works is "The Apple Macintosh Book", the first edition of which was released almost simultaneously with the Macintosh 128K in 1984. The second edition covered the Macintosh 512K, while the third edition covered six Macintosh models in all. The fourth edition of the book (published in 1992) covered 21 models (including discontinued models, such as the Macintosh 128K), and even included mentions of the Macintosh Classic series, the Macintosh Quadra series, the PowerBooks, and System 7.