Affiliate Marketing Secrets

I am having terrible trouble selling my ebook Celebrity Ghost Stories. I have done everything to promote it: put it on the front page of my true ghost stories site (which gets over 1000 new visitors every day!), mentioned it in relevant blogs and forums, promoted it on Myebook.com. Yet despite all this, I haven’t sold one single copy/1
Could it be that the paranormal ebook business is not a very profitable one? Should I pick another niche?
Huh, so much for all those who say that selling ebooks is a lucrative business!