h1  {
	text-align: center;
	font-variant: small-caps;
	color: #0a03e0;
}
div.main {
/*    justify-content: center;*/
}
div.tail {
    clear:both;
    width: 100%;}
div.book {
    float:left;
    width: 200px;
    height:270px;
}