Product Advertising API
Developer Guide (API Version 2013-08-01)

Related Items

With an ItemLookup request, you can specify the RelatedItems response group to return information about items related to the item in the request. Digital items include downloadable music (search index: MP3Downloads), downloadable video (search index: UnboxVideo), and digital books (search index: KindleStore). For example, a related item can be all the shows in a TV series that are available separately or the songs on a CD.

You can use the RelationshipType parameter to see how items are related to each other. In an ItemLookup request, specify the RelationshipType parameter and the RelatedItems response group. Sample values include Episode, Season, Tracks, and Variation. For a complete list of values, see ItemLookup.

Each ItemLookup request can return, at most, 10 related items. To return more items, use the RelateditemPage parameter. For example, a value of 2 returns the second set of 10 related items.