Net::Amazon::Validate::ItemSearch::us::KindleStore - valid search indicies for the us locale and the KindleStore SearchIndex.

The default value is Title, unless mode is specified.

The list of available values are:

    Author
    BrowseNode
    Condition
    ItemPage
    Keywords
    MaximumPrice
    MerchantId
    MinimumPrice
    Power
    Publisher
    Sort
    TextStream
    Title