(puts on flame suit)
look at the back of your wife. tell her that now that you're seeing the back of your [most recent] wife, you have a good idea on what your next wife should look like. get said new wife.
no back covers, but most sites kind of replace that with the recommendations - either more by the same author or others that are highly rated in the same genre by different authors. it's very likely more dynamic and tailored than what paper books had.
there's also sites like Goodreads which can recommend next reads based on what you've read and liked in the past (and you can pre-populate using the paper books you've read before the internet was even invented). normally the site needs you to have read-and-rated 20 books, so that's a quick way to get to that number.