The title of the book goes between <title<</title>. See the following correct header code.
Code:
<?xml version='1.0' encoding='utf-8'?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">
<head>
<title>Name of book</title>
<link href="../Styles/Style0001.css" rel="stylesheet" type="text/css"/>
</head>
<body>