body{
    			background-image: url("https://i.redd.it/e98gbiyvklx41.jpg");
				background-size: cover;
  				background-position: center top;
  				background-repeat: no-repeat;
			}

			#duna{
				width: 75%;
  				height: 600px;
  				border: 5px solid #FFFFFF;
  				padding: 5px;
  				margin: 15px; 
			}
			
			.centralizado{
				text-align: center;
				color:#C2FBFC;
			}
			
			p{
				text-align: center;
				font-size: 20px;
				color:#C2FBFC;
			}
			
			#book1{

				width:  150px;
				height: 200px;
				margin-left: 20%;
				margin-top: 2.5%
			}

			#book2{
				width: 150px;
				height: 200px;
				margin-left: 10%;
				margin-top: 2.5%;
			}

			#book3{
				width: 150px;
				height: 200px;
				margin-left: 10%;
				margin-top: 2.5%;
			}
			
			#book4{
				width: 150px;
				height: 200px;
				margin-left: 20%;
				margin-top: 2%;
			}
			
			#book5{
				width: 150px;
				height: 200px;
				margin-left: 10%;
				margin-top: 2%;
			}
			
			#book6{
				width: 150px;
				height: 200px;
				margin-left: 10%;
				margin-top: 2%;
			}