in logic its $book->author->name?
yes! or even shorter, in sintags:
{book.author.name}
But the authors' names need to be loaded. So you'll have to include the model in the find in your controller:
$this->books =& $this->Book->find('all', array('include' => 'author'));
Or if you're dealing with the detail page of a book: (an 'edit' or 'show' action)
$this->book->author->load();
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