This information is related strictly to enhanced configurations for the Book navigation block. If you need detailed information on basic block configuration, please review the Blocks section of this book.
The Book navigation block is a special block that is created by the Book module. Like all other blocks, it's located at Admin menu > Site building > Blocks.
In addition to the standard configurations you can make to all blocks, the Book navigation block has an additional configuration you can apply - one that will force the Book navigation block to only show itself on Book pages. This is a handy feature that will help you save space on your sidebars when your users aren't actively looking at your book content.

To configure your Book navigation block, do the following:
Your book navigation block will now only show on book pages. You will need a way to lead your audience into this section, though. There are a couple of ways you can do this. The most straightforward way is to add a link to the top page of your book in a menu somewhere. You can do this through the Menu settings fieldset of your top page. An example, using the Drupal Deep Dive book in this site, is shown below.

Another method is to create a custom block, embed an image or add text into the block, and then create a link to the top page of your book. The following example shows the Technical Manuals sidebar graphic used on this site, which links to a view of all Book titles in existence on this site. From there, the user can select the desired book.
Training Manuals Graphic
Training Manuals View
Both of these techniques are used on this site. Explore the methods used and try one for yourself.