<ul class="book-box-tools">
<li class="book-box-read">
{% if book.html_file %}
- <a href="{% url book_text book.urlid %}" class="mono downarrow">{% trans "Read online" %}</a>
+ <a href="{% url book_text book.slug %}" class="mono downarrow">{% trans "Read online" %}</a>
{% endif %}
</li>
<li class="book-box-download">