This page and the ones linked to it show how you can use Harris Test to produce HTML internet quizzes and then link them together into an internet textbook.
When you create your internet textbook the "contents" page must be manually produced, as was this one, however all the pages linked to it were produced completely by Harris Test.
Note: this is a pretty crummy textbook and was created only to show you the possibilities. Since you create the text part of each lesson on your word processing software (which is then read by Harris Test when it is compiling each lesson), and the program can link multiple documents into one lesson, and there is no limit to the lenght of each text, each one of your lessons can be quite complex.
By Prof. Abraham Lincoln
The Solar System
The Inner Planets