Currently, the list of books are sorted in the Wikisource reader app based on the pageviews data denoting their popularity and alphabetically. Books can also be sorted in a randomized manner, so that users can get a chance to find the books which are somewhere in the middle of these lists
The randomised sorting should be made possible from the wsindex API and then the sorting option should be visible in UI.
In the sort options, there should be an extra way to sort i.e. randomised sort. More options can come in future