render() { const { book } = this.state; if (this.state.Loading) { return <div>Loading ....</div> } return ( <div > <div > <h1>{book.Ad}</h1> </div> <div > <h1>Id : { book.id }</h1> <h1>author : { book.yazar }</h1> <h1>publisher : { book.yayinevi }</h1> <Link to ="/" className="link">Go to homepage</Link> </div> </div> ); }