$this->addResource(new Zend_Acl_Resource('books'));
    $this->addResource(new Zend_Acl_Resource('login'));
    $this->addResource(new Zend_Acl_Resource('logout'));

    $this->addRole(new Zend_Acl_Role('guest'));
    $this->addRole(new Zend_Acl_Role('user'), 'guest');

    $this->allow('guest', 'login');
$this->allow('user','logout');
    $this->allow('user','books');

$this->deny('guest', 'logout');
$this->deny('user', 'login');

<configdata>
    <nav>
        <books>
           <label>Books</label>
           <controller>books</controller>
           <action>index</action>
           <resource>books</resource>
           <pages>
                    <add>
                        <label>Add</label>
                        <controller>books</controller>
                        <action>add</action>
                    </add>
                    <edit>
                        <label>Edit</label>
                        <controller>books</controller>
                        <action>edit</action>
                    </edit>
                    <delete>
                        <label>Delete</label>
                        <controller>books</controller>
                        <action>delete</action>
                    </delete>
          </pages>
       </books>
   </nav>
</configdata>

$this->allow('guest', 'books', array('index', 'add')

$this->allow('user', 'books', array('edit','delete')); // index & add are inherited

$this->deny($this->editor,'artist',array('delete'));