You can add links to text.
How it works
Use $L and curly brackets around the text you wish to use as link text. Then add the address to link using double equal signs.
This is how you $L{{link some text==http://somewebsite.com/}}.
Links are handled automatically by the book reading software.
Inline links
You can link to anything you have included in your table of contents using the special $TOCL tag.
Go to $L{{chapter three==$TOCL 3. The Valley of Fear}}.
Note: the $TOCL text must be exactly correct for the link to work.