Book cover research: Eleanor and Park

As for the 'Oranges are not the only fruit' I am creating a pretty contemporary cover for a story that is set in the 60's I felt that it was appropriate to reference the book 'Eleanor and Park' by Rainbow Rowell. It is a romantic novel that was written in 2013 but is set in 1986. I am aware that 1986 wasn't that long ago but the cover very much looks like this is a very contemporary story. Two book covers have been released for it and they are both very modern and don't reference the time period that the story is set in at all. Despite this the book has been incredibly successful. I think it is a really good thing sometimes for older books or books set in a different time period to have modern covers to open the book up to a new younger market that usually wouldn't consider even picking the book up. In my opinion If this book cover had been done in a style that referenced the time it was set in, I don't think it would have been half as successful. I know they say you shouldn't judge a book by its cover but its clear that people will and do, do that because it gives the first impression of whats inside. I really like both of these covers and although I haven't yet read the book these covers encourage me to, and I think I will when I have some spare time. 

Eleanor and Park book cover, Image taken from:
http://pixgood.com/eleanor-and-park-book-cover.html

Emeanor and Park Book cover 2, Image taken from:
 http://pixgood.com/eleanor-and-park-book-cover.html