This was the major papercut for me when using peruse to read through a manga series.
When you currently select a new entry from a series, the bookinfo keeps visible, as well when going back there seems to be a collection of book viewers open.
What this patch does is that selecting a book with < and > as well as clicking on the thumbnail will change the bookinfo, and clicking a second time, or pressing return will close the current book and open the new one.
Making a review request out of this because it does change behaviour quite a bit.