A good editor would have caught these errors. In general, the explanations are good, though not heavily detailed. The author's style is casual and simple, making it easy to read and understand. All this is a prelude to getting down to the serious business of scripting. Part 4 covers shell scripting, and Part 5 covers better shell scripting.
Examples are simple and to the point, demonstrating the current topic quite aptly.
Also in Part 4, he covers passing parameters, creating screen input, debugging and built-in commands. He includes a goodly sample of his own administration scripts which are quite helpful. There is much useful information in these two sections to help the beginning scripter. I did not find technical errors in these parts as I did in the beginning. With a good editor, it will be even better in a section edition.