title: Amazon AWS ItemLookup with 13 Digit ISBN
body: <p>I used to be able to do 13 digit ISBN lookups, but now I can't.</p>
  
  <p>Here is the query for the 13-digit ISBN: 9780073380957.</p>
  
  <p><a href="http://ecs.amazonaws.com/onca/xml?AWSAccessKeyId=" rel="nofollow noreferrer">http://ecs.amazonaws.com/onca/xml?AWSAccessKeyId=</a>&amp;ItemId=9780073380957&amp;Operation=ItemLookup&amp;ResponseGroup=Images%2CItemAttributes&amp;Service=AWSECommerceService&amp;Timestamp=2009-12-16T14%3A30%3A02Z&amp;Version=2009-06-01&amp;Signature=</p>
  
  <p>Returns:
  f6770ab1-9b3e-48d3-9492-750e8d773c1b0.0053760000000000TrueNewShipASINAmazon19780073380957ImagesItemAttributes1-SubmissionDateAllAWS.InvalidParameterValue9780073380957 is not a valid value for ItemId. Please change this value and retry your request.</p>
  
  <p>However, the 10-digit ISBN for the same book works:</p>
  
  <p><a href="http://ecs.amazonaws.com/onca/xml?AWSAccessKeyId=" rel="nofollow noreferrer">http://ecs.amazonaws.com/onca/xml?AWSAccessKeyId=</a>&amp;ItemId=0073380954&amp;Operation=ItemLookup&amp;ResponseGroup=Images%2CItemAttributes&amp;Service=AWSECommerceService&amp;Timestamp=2009-12-16T14%3A44%3A10Z&amp;Version=2009-06-01&amp;Signature=</p>
  
  <p>I'm using pyaws, if that makes any difference.</p>