DESCRIPTION
The default value is Books, unless mode is specified.The list of available values are:
Apparel Automotive Baby Beauty Books DigitalMusic Electronics GourmetFood HealthPersonalCare HomeGarden Jewelry Kitchen Magazines Miscellaneous MusicTracks MusicalInstruments OfficeProducts OutdoorLiving PCHardware PetSupplies Photo Software SportingGoods Tools Toys UnboxVideo VideoGames Wireless WirelessAccessories