Back when Livejournal first came out, a friend of mine started one up for an evil overlord persona. It was interesting primarily for a "this is how it’s done" perspective and for its humour; I don’t know if it could have sustained a whole book, but that just means I personally haven’t thought of a way to do it. You might.

Thing is, though, villains are supposed to be that which we as a society emphatically Do Not Want. In order to keep a reader’s interest, you risk making your villain protagonist character so sympathetic that the reader winds up rooting for them all the way, and do you really want the implications of that? Alternatively, they might wind up "petting the dog" so often that they cease to be villains altogether.

A moral grey zone might be the way to go. I haven’t read any of the "Game of Thrones" series, but I get the impression (all my friends are geeks) that’s pretty much what Mr. Martin did there.

I’m kind of married to the mystery (real world setting) genre right now, but I have had a fantasy setting in mind for the longest time. It involves someone claiming to be the long-lost High King of a fantasy kingdom, and the reactions of the feudal dukes who have no intention of giving up their power. The key point is that it is never made clear whether the so-called High King’s claim is legit: he could be the real thing; or he could be a pretender; or he could simply be mistaken. And if he isn’t the legitimate High King, what if he’s still the best thing for the kingdom right now? Would the dukes be the good guys or the bad guys for opposing him?

1) Get to the "edit chapter" page. There are two ways to do this: a) go to the chapter page as though you were going the to read the whole chapter, and click on the word "Edit" up at the top right of the screen, where it says "Send to readers / Edit"; or b) go to the project page for the book, click on the word "Edit" up at the top right of the screen, where it says "Sell pre-orders / Edit", then click on the little "edit" icon at the bottom of the chapter you want to edit (the first chapter will have icons for "upload", "edit", and "delete", whereas subsequent chapters will also have "feature" in addition to those three.)

2) Do your edits. The text should be in a box bound by a yellow border, and any reader comments made to the text should not be there.

3) Click "Save", up at the top right of the screen where the "Edit" button used to be.

4) I think you can just navigate away from the page now, and the changes should stick; but to do this properly it would be best to click "Done", next to the "Save" button. This will take you to the "edit project" page for the book itself. Again, you can probably just navigate away now (that’s what I do) but you can also click the "Save" button for the project, and that will take you back to the project page for the book.