app/views/manifestations/_prepare_book_jacket.mobile.erb
<% if Setting.book_jacket.source == :google %>
<script type="text/javascript" src="http://books.google.com/books/previewlib.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<!-- thumbnail script here -->
<%= render 'manifestations/google_book_thumbnail_script' %>
<% end %>