// url to look up a book ISBN13 9781880418116, should be all on one line http://ecs.amazonaws.com/onca/xml ?AWSAccessKeyId=XXXXXXXXXXXXXXXXXXXXXX <-- your id goes here. &AssociateTag=canadianmindprod &IdType=EAN &ItemId=9780618918249 &Operation=ItemLookup &ResponseGroup=Small &SearchIndex=Books &Service=AWSECommerceService &Timestamp=2012-12-11T15%3A35%3A59.000Z &Version=2011-08-01 &Signature=AeE83W1ymv7OkyA%2FtwChhaa16NN5%2BbBPZ4g8SilOSmw%3D <-- HMAC digitally signed with your private key