Abduct.com (USA) 
 ABE Books (UK/USA)
 Alibris
 Amazon (UK, Canada, Japan, France, Germany, Japan)
 Amberley Publishing
 ASDA
 Base.com
 Blackwells
 Boganmeldelse.com (Sweden)
 Book25.us (USA)
 Bookfellas
 BooK Depository
 Bookmap.jp (Japan)
 Bookstore Direct
 Computer Manuals
 Deastore.com (Italy)
 Eason (Ireland)
 Emporium Books (Australia)
 Eruditor.com
 Exclusivebooks.com (South Africa)
 Fishpond.com (Australia)
 Femaleshopper.co.uk
 Foyles
 Gettextbooks.co.uk
 Jump.co.za (South Africa)
 Kriso.lv (Greece)
 Layerment.com (UK/USA)
 Norli.no (Norway)
 Okian.ro (Romania)
 Pick a Book 
 Play.com
 PlayTrade.com
 R-PD.com (Japan)
 Saxo.com (Denmark)
 Scramble-egg.com (Japan)
 Sendit.com
 ShopIreland.ie (Ireland)
 Shopping-jubei.jp (Japan)
 Sisbok.no (Norway/Sweden)
 Tesco
 The Hut
 The Nile (Australia and New Zealand)
 Virgin Media
 Waterstones
 WH Smiths
 Word-Power
 Wook (Portugul)