Relaunching your book with a new cover

A year ago, I published "Teaching Tori" with a book cover that I liked a lot. But has the cover helped sell the book? And would I have to get a new cover to go with the book's sequel, "Teaching Tom"? In brief, the answer to the questions are: 1. No, 2. Yes. This is the book cover of "Teaching Tori" as I had it since its launch in July 2014. I really liked this cover because of its colour scheme, the font and the girl. The landscape of Central Otago in the background plays an important part in this story, so I was very happy to have it as part of the book cover. I liked the font too. One year on, I'm not so sure any more. The girl looks a bit squashed under the title bar, the colours are rather flat, but most of all, the cover doesn't convey what type of genre this is. Apparently, romance novels are among the best selling books on kindle, but mine certainly isn't. (Actually, I'll be honest with you - this is how many books I&