Book page content is very similar to other basic node types in OSU Drupal 6.
To create Book page, similar to all other content types, go to Admin menu > Content management > Create content and select the Book page content type.
There are a couple of things that differentiate Book page content from other types. The first is the use of the Book outline element on the node submission form. The second is the display of two links on the saved content: Add child page and Printer friendly version.
Let's walk through the process of creating a Parent page, and how to create a Child page from a Parent page.
Book Page Submission Form
Once your node is in View mode, look to the bottom of the content area. You should see two links: Add child page and Printer friendly version.

Once you have a parent page, to add additional pages to your book, just click the Add child page link. This will open a new, blank Book page submission form and automatically relate it to the parent.

Child pages can have child pages of their own. In fact, the outline structure you can build using Book page content type can go up to 9 levels deep. It's suggested, though, for the sake of clarity (and so things fit well in the Book navigation block) that you keep the depth to 4-5 levels. If your content's outline structure exceeds this, you may want to re-examine how you have structured it out and split your work into separate books.
So now that we know how to create a basic book structure,let's take a look at the other components of the Book module that make it unique.