<h1><%= @book.title %></h1>

<ol>
  <% @book.chapters.each do |chapter| %>
    <li><%= link_to chapter.title, [@book, chapter] %></li>
  <% end %>
</ol>
<h1><%= @book.title %></h1>
<ol class='chapters'>
  <% @book.chapters.each do |chapter| %>
    <li><%= link_to chapter.title, [@book, chapter] %></li>
  <% end %>
</ol>
Add class to chapters ol on books/show to style it
Add class to chapters ol on books/show to style it
