As Harry Potter begins his 6th year at Hogwarts School of Witchcraft and Wizardry, he discovers an old book marked mysteriously "This book is the property of the Half-Blood Prince" and begins to learn more about Lord Voldemort's dark past.

Release dates:

Belgium 19 November 2008
Egypt 19 November 2008
Argentina 20 November 2008
Germany 20 November 2008
Greece 20 November 2008
Netherlands 20 November 2008
Russia 20 November 2008
Singapore 20 November 2008
Brazil 21 November 2008
Denmark 21 November 2008
Finland 21 November 2008
Italy 21 November 2008
Japan 21 November 2008
Mexico 21 November 2008
Norway 21 November 2008
Sweden 21 November 2008
Turkey 21 November 2008
UK 21 November 2008
USA 21 November 2008
France 26 November 2008
Croatia 27 November 2008
Bulgaria 28 November 2008
Estonia 28 November 2008
Lithuania 28 November 2008
Poland 28 November 2008
Romania 28 November 2008
Spain 28 November 2008
Venezuela 28 November 2008
Australia 11 December 2008

Also Known As (AKA)
Harry Potter y el misterio del príncipe Argentina / Spain / Venezuela
HP and the HBP International (informal short title) (English title)
Hari Poter i polukrvni princ Serbia
Harry Potter e il principe mezzosangue Italy
Harry Potter e o Enigma do Príncipe Brazil
Harry Potter e o Príncipe Misterioso Portugal
Harry Potter und der Halbblutprinz Germany
Harry Potter y el misterio del principe International (Spanish title)
The Half-Blood Prince USA (short title) (less info)