Can anyone name some books like the blood series that are available to read online?

I like romance novels that have a historical or supernatural theme to them. The blood series by Sharon Page has all these themes but not all of her books are available to read online.

I would like to read a novel where the story is heavily centred around the romance of two characters (female and male).
I prefer it to have, I suppose, sex scenes but I don't want that to be the core of the book.
I would like it to have some sort of historical theme but it doesn't have to be a supernatural or fantasy book.