help digging out an image tag

I'm trying to map an img to an image field, but I'm having hard time using xpath to dig it out of the feed. So far I have tried:

base query: //item

*/img/@src
//img/@src

Neither works. Here is a sample item from the feed (the img tag is pretty buried) (full feed at www.wowbrary.org/rss.aspx?l=1630)

<item>
<title>Balto II - Wolf Quest</title>
<description>
As if becoming a new father isn't enough, Balto the half-wolf is puzzled by a recurring nightmare involving a treacherous journey, some threatening characters, and plenty of unanswered questions. Chalk it up to parenthood: nightmare turns into reality when the last of his litter, whom no human will adopt, learns the devastating truth about her mixed heritage and embarks on a dangerous <I>Wolf Quest</I>, with papa Balto hot on her trail. The result is 75 minutes of engrossing action, beautifully integrated songs, well-timed humor, polished animation, and a refreshing tendency to surprise rather than shock.
</description>
<link>
http://www.wowbrary.org/l.aspx?l=1630&c=632690&i=9780783248929&u=025192110221&t=Balto+II+-+Wolf+Quest&rss
</link>
<pubDate>11/6/2012 10:23:24 PM</pubDate>
<content:encoded>
<![CDATA[
<table><tr> <td align='right' valign='top' style='padding-bottom: 10px; padding-right: 8px;'><a href='http://www.wowbrary.org/l.aspx?l=1630&c=632690&i=9780783248929&u=025192110221&t=Balto+II+-+Wolf+Quest&rss'><img src='http://images.amazon.com/images/P/B00005TSMM.01._AA_SCMZZZZZZZ_.jpg' border='0'></a></td> <td valign=top style='padding-bottom: 10px;'><a href='http://www.wowbrary.org/l.aspx?l=1630&c=632690&i=9780783248929&u=025192110221&t=Balto+II+-+Wolf+Quest&rss'><B class='NUTITLE'>Balto II - Wolf Quest</B></a> <a href='http://www.amazon.com/gp/product/B00005TSMM?ie=UTF8&tag=interacscienc1630-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=B00005TSMM' class='NUBUTTON'>Reviews</a>&nbsp;&nbsp;<a href='http://www.wowbrary.org/l.aspx?l=1630&c=632690&i=9780783248929&u=025192110221&t=Balto+II+-+Wolf+Quest&rss' class='NUBUTTON'>Borrow</a>&nbsp;&nbsp;<a href='http://www.amazon.com/gp/aws/cart/add.html?AssociateTag=interacscienc1630-20&SubscriptionId=1JX7X7270Z74G24Q2T82&Quantity.1=1&add=Buy%20from%20Amazon.com&ASIN.1=B00005TSMM' class='NUBUTTON'>Buy</a><br> <i>From Universal Studios.</i><BR>Amazon rank #20,020<br>&nbsp;<br>As if becoming a new father isn't enough, Balto the half-wolf is puzzled by a recurring nightmare involving a treacherous journey, some threatening characters, and plenty of unanswered questions. Chalk it up to parenthood: nightmare turns into reality when the last of his litter, whom no human will adopt, learns the devastating truth about her mixed heritage and embarks on a dangerous <I>Wolf Quest</I>, with papa Balto hot on her trail. The result is 75 minutes of engrossing action, beautifully integrated songs, well-timed humor, polished animation, and a refreshing tendency to surprise rather than shock.</td></tr></table>
]]>
</content:encoded>
<category>DVDs</category>
</item>