`app/views/books/index.html.erb`:
```html
<p id="notice"><%= notice %></p>

<% @links.each do |link| %>
  <h3><%= link_to link.title, link %></h3>
  <p> Submited <%= time_ago_in_words(link.created_at) %> ago by <b><%= link.user.email %></b></p>
<% end %>
```