public object Get(BookById book)
 {
     return Repo.GetBookById(book.Id);
 }
 public object Get(BookById request)
 {
     return Repo.GetBookById(request.Id);
 }
 public void Delete(BookById book)
 {
     Repo.DeleteBook(book.Id);
 }
 public void Delete(BookById request)
 {
     Repo.DeleteBook(request.Id);
 }