Please let us track how long we read per session. This would work quite simply - when you want to start reading, you click or tap the timer (which can be paused if you need to take a moment) which will then keep track of how long you're reading until you turn it off again.

When the timer is up, it'll automatically log your time read for that specific book, author, series, genre, whatever category you can think of, and add it to the relevant categories. This would allow you to track how long you take to read a book or series, and exactly how much time in a given period you spend reading a book.

I personally think this would be an excellent addition, even if it is just a benefit for plus users only (though perhaps standard users should be allowed to track the time per book, and time per category would be a plus feature)