The Rebranding and the ClickBank links do work in your ebook. Try the Next/Previous options in the toolbar, and they will work
The error I found is if you look at your index page, and move the mouse over "Click here to Enter" - you will see a very odd status line beginning with file://
I think what you have done is somehow made that link to your specific source files folder, rather than the pages in the ebook.
On your computer - once you are viewing these "external" files, you will find the preprocessor seems not to work (because you are viewing these external files not the ones in your ebook), the Next/Previous buttons seem not work etc (same problem)
On my computer if I click this link, I get an error, because I don't have this external source folder
Look in the source of index.html [using a text editor like Notepad etc], and I think you will see code something like
Click <A HREF="file:///D:/MyFreeBook/chapter_1.html">here</A> to Enter
Click <A HREF="D:\MyFreeBook\chapter_1.html">here</A> to Enter
Change this to
Click <A HREF="chapter_1.html">here</A> to Enter
and this should solve the problem
It would also pay to check all the other links in the ebook. Use the Windows Find In Files (on the Start menu) to search your HTML folder for "file:" or "MyFreeBook", and this will tell you if any other files contain links with the same type of problem.
You can also check the links , by mouse-overing them in the ebook and looking at the status bar. If the status bar says something beginning with file:// you know the link is funny.
By the way, it looks like a very attractively presented ebook (sorry didn't get to read it, just checking the links!). I didn't spot any other errors (Which is not to say there aren't any), but the menu on the side of Chapter 6 looks a bit strange, as the last item seems to sort of flicker