The Tracks response group provides track title and number for each track on each CD in the response.
Sample Response (REST)
<?xml version="1.0" encoding="UTF-8"?>
<ItemLookupResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2005-10-05">
<OperationRequest>
<HTTPHeaders>
<Header Name="UserAgent" Value="Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"/>
</HTTPHeaders>
<RequestId>0X8FK14MC5CWTQE05TEF</RequestId>
<Arguments>
<Argument Name="Service" Value="AWSECommerceService"/>
<Argument Name="AssociateTag" Value="[Your Associate ID Here]"/>
<Argument Name="AWSAccessKeyId" Value="[Your Access Key ID Here]"/>
<Argument Name="ItemId" Value="B00000JHAU"/>
<Argument Name="ResponseGroup" Value="Tracks"/>
<Argument Name="Operation" Value="ItemLookup"/>
</Arguments>
</OperationRequest>
<Items>
<Request>
<IsValid>True</IsValid>
</Request>
<Item>
<ASIN>B00000JHAU</ASIN>
<Tracks>
<Disc Number="1">
<Track Number="1">The Stars Of Track And Field</Track>
<Track Number="2">Seeing Other People</Track>
<Track Number="3">Me And The Major</Track>
<Track Number="4">Like Dylan In The Movies</Track>
<Track Number="5">The Fox In The Snow</Track>
<Track Number="6">Get Me Away From Here Im Dying</Track>
<Track Number="7">If Youre Feeling Sinister</Track>
<Track Number="8">Mayfly</Track>
<Track Number="9">The Boy Done Wrong Again</Track>
<Track Number="10">Judy And The Dream Of Horses</Track>
</Disc>
</Tracks>
</Item>
</Items>
</ItemLookupResponse>
The Request that Generated the Response (REST)
http://webservices.amazon.com/onca/xml?Service=AWSECommerceService
&AWSAccessKeyId=[Your Access Key ID Here]
&AssociateTag=[Your Associate ID Here]
&Operation=ItemLookup
&ItemId=B00000JHAU
&ResponseGroup=Tracks