Hi there,
Check out the CSS for monochrome theme. Maybe you accidentally hid the links or gave them the same color as the background?
For future posts, can you please post in the book's forum located here:
http://p2p.wrox.com/forum.asp?FORUM_ID=386 ? That way, all questions about the book are at a single location which makes it easier for others to find stuff.
Cheers,
Imar