<nav epub:type="page-list">
    <h1>Page List</h1>
    <ol>
        <li><a href="chapter001.xhtml#page001">1</a></li>
        <li><a href="chapter001.xhtml#page002">2</a></li>
        …
    </ol>
</nav>

And don’t limit yourself to paper thinking. The navigation document allows any number of useful navigation lists you can devise. Maybe you want to give readers a quick reference to major scenes in your story, for example. There are innumerable ways in which you can expand on this functionality, but semantics and support are going to take community and player support to implement. But that’s true of all new functionality.