The book would be copyrighted by one of my sites, but I'd be making it clear that the ebook can be distributed freely. Combined with a 'tell a friend' email script on the page, I'm hoping this might help drive some traffic towards both sites.
Obviously there are a few variables to consider, not least of which is the quality of the ebook, which I will ensure is high.
Just wondering if any of you have experience of doing this? I'm kind of new to internet marketing like this and so don't have any experience to draw directly from.