John Lewis place a cookie which lasts for 29 days from initial click through.
<blockquote class="twitter-tweet"><p><a href="https://twitter.com/search/%23competition">#competition</a> to <a href="https://twitter.com/search/%23win">#win</a> copy of What if Humans Were Like Animals closes today:<a href="http://t.co/UGITT7kEzj" title="http://www.thebookbag.co.uk/reviews/index.php?title=What_If..._Humans_Were_Like_Animals%3F_by_Paul_Moran">thebookbag.co.uk/reviews/index.…</a> <a href="https://twitter.com/search/%23kidlit">#kidlit</a> <a href="https://twitter.com/search/%23giveaway">#giveaway</a></p>— TheBookbag.co.uk (@TheBookbag) <a href="https://twitter.com/TheBookbag/status/340375094360694784">May 31, 2013</a></blockquote>
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