Net::Amazon::Validate::ItemSearch::de::MerchantId;
The default value is Books, unless mode is specified.
The list of available values are:
Apparel
Baby
Books
Electronics
ForeignBooks
HealthPersonalCare
HomeGarden
Kitchen
Magazines
MusicTracks
OutdoorLiving
PCHardware
Photo
Software
SoftwareVideoGames
SportingGoods
Tools
Toys
VideoGames
Watches