public static String GetChapterID(String bookID, nint pageNumber)
        {
            Page page = PagesOnDeviceDataAccessor.GetPage(bookID, pageNumber);

            if (page != null)
            {
                return(page.ChapterID);
            }
            else
            {
                return(String.Empty);
            }
        }
 public static Page GetPage(String bookID, String pageID)
 {
     return(PagesOnDeviceDataAccessor.GetPage(bookID, pageID));
 }
 public static Page GetPage(String bookID, nint pageNumber)
 {
     return(PagesOnDeviceDataAccessor.GetPage(bookID, pageNumber));
 }