istitem">
            We can use <a href="http://www.boost.org/libs/multi_index/doc/index.html" target="_top"><span class="bold"><strong>Boost.MultiIndex</strong></span></a> for the new beast.
          </li>
</ol></div>
<p>
        Option 1 is the wrong approach, if we go this path we lost what bimap has
        won us. We now have to maintain the logic of two interdependent containers,
        there is an extra string stored for each book name, and the performance will
        be worse. This is far away f