Here is a more extensive list of where the book can be bought:
UK – Amazon (UK), or Blackwell or Word Power or Waterstones or CD WOW! or Sprintbooks or Snazal or The Book Depository or WH Smith or JS Campus or EdenBookShop or ASDA or Foyles
USA – CD WOW! or Amazon or SuperBookDeals or Powell’s Books or ecampus.com
Germany – Amazon or Bol or Buch.de or CD WOW! or libri.de or Hugendubel
Italy – Unilibro
Sweden – Adlibris or Bokus or CD WOW! or Bokia
Norway – Norli or Bokklubben or bokkilden.no or akademika or ark or capris.no
Denmark – CD WOW!
Hong Kong – CD WOW!
New Zealand – Fishpond or Academy Books or CD WOW! or Mighty Ape
Australia – BigW or CD WOW! or play4me or The Nile or Angus & Robertson
India – Infibeam
Estonia – Kriso or Rahva Raamat
The Netherlands – Boek.net or Libris or NNB
Greece – Vivlia
Ireland – shopireland or CD WOW!
Romania – Okian
Switzerland – soundmedia or buch.ch
South Africa – kalahari.net
