public ActionResult Create(Book book)
        {
            if (ModelState.IsValid)
            {
                db.Books.Add(book);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(book);
        }
        public ActionResult Edit([DataSourceRequest] DataSourceRequest request, Book book)
        {
            var dbBook = db.Books.FirstOrDefault(x => x.BookId == book.BookId);
            dbBook.Author = book.Author;
            dbBook.Description = book.Description;
            dbBook.ISBN = book.ISBN;
            dbBook.Title = book.Title;
            dbBook.WebSite = book.WebSite;
            db.SaveChanges();
            return RedirectToAction("Index");

            return View(book);
        }