Add default sort order for chapters #32
Description
Currently the book chapters are returned in no particular order and cannot be sorted according to any information that the API contains. The only way to sort them is to already know the correct order and sort against it.
Option 1: The id's are given chronologically to each chapter, so the chapters can be sorted by id.
Option 2: Adding a chapter column, where each chapter receives a number. LotR is divided into several books, so it would have to be non unique, as there will be multiple chapter 1, but could still be sorted, if given a book id as well.