book{
	display:block;
	font-size:120%;
	margin-top:15px;
	margin-bottom:15px;
	margin-right:15px;
	margin-left:15px;
	background-color:WHITE;
	
}
book title{
display:block;
font-size:145%;
text-align:center;
color:gray;
}
chapter title
{
display:block;
font-weight: bold;
color:red;
text-align:center;
font-size:160%;
}
section title{
color:blue; 
font-size:140%;
}
 title{
color:blue;

}