<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head th:include="include :: header"></head>
<body class="gray-bg">
<div class="wrapper wrapper-content ">
    <div class="row">
        <div class="col-sm-12">
            <div class="ibox float-e-margins">
                <div class="ibox-content">
                    <form class="form-horizontal m-t" id="signupForm">
                        <input id="id" name="id" th:value="${book.id}"
                               type="hidden">
                           