if(isDbEmpty("books"))
            {
                using (StreamReader r = new StreamReader("Books.json"))
                {
                    string json = r.ReadToEnd();
                    List<Book> Books = JsonConvert.DeserializeObject<List<Book>>(json);

                    foreach(var b in Books)
                    {
                        _db.Books.Add(new Book{
                            Title = b.Title,
                            AuthorFirstName = b.AuthorFirstName,
                            AuthorLastName = b.AuthorLastName,
                            PublishDate = b.PublishDate,
                            ISBN = b.ISBN
                        });
                    }
                    _db.SaveChanges();
                }
            }