I want to buy a book for dummies but when I am on the checkpoint I can't find my country.I live in Greece
I'm sorry for that frustration, Eleftherios--Please, try locating the book on www.wiley.com, from here (at the top of the page) you can change your country location. This should help alleviate that problem for you.
Also, if you can tell me what book you were trying to purchase, I can look to see if there is a problem with that particular product on www.dumies.com.
Tom with Wiley
Community Technical Support