.book {
	padding: 15px 0 0 0;
	margin: auto;
}


.shelf {
	border-bottom: 30px solid #cea363;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
	top: -15px;
	z-index: -10;
}

/*Example adding pseudo element to give shelf depth*/
.shelf:after {
	content: '';
	background: #ae7e37;
	height: 20px;
	width: calc(100% + 40px); /*IE9+*/
	position: absolute;
	top: 30px;
	left: 0;
	right: 0;
	z-index: 1;
	margin: 0 -20px;
}