<ul>
   {% for x in lk1 %}
      <li><a href="{{ url_for('bookPage'}}">{{ x[2] }}   (by) {{ x[3] }}  (year) :  {{ x[4] }}</a></li>
   {% endfor %}
 </ul>

<ul>
    {% for x in lk1 %}
      <li><a href="{{ url_for('bookPage', title=x[2] }}">{{ x[2] }}   (by) {{ x[3] }}  (year) :  {{ x[4] }}</a></li>
    {% endfor %}
</ul>

@app.route('/books/<title>' )
# the name of this function have to be used in
# url_for ('nameOfFunction',  name_of_variable_part_of_url=some_internal_variable)
def bookPage(isbn):
     # code, that will creat yourlist
     # book.html - template for book
     # listofvariables - variables for book's page
     #
     return render_template ("book.html", listofvariables=yourlist)