Barbara, first, your blog should be integrated into your website — you don’t want your blog at one URL and your website at another. It’s counter-productive — you’ll have to drive traffic to 2 sites, not one. That aside, I don’t know enough to give you solid advice but in general, if you plan to write more than one book or if you plan to build some kind of business around this book, then you’ll want to use a URL for your name, not the book title. Book-title-only URLs are best for people who write a book that is unrelated to what ever else they’re doing online (for example, a human resources consultant writing a YA novel).

Sandy