The book, released on 4 December 2008, was published in the United Kingdom and Canada by Bloomsbury, while the US edition was published by Scholastic, and the limited collector's edition of the book, available in all three countries, by Amazon. The limited edition retailed for £50 ($100, €100), and around 100,000 copies have been printed. The book has been translated into 28 languages. Profits from the sale of the book were offered to the Children's High Level Group. Initial sale estimates were roughly £4 million ($7.6 million, €4.7 million); as of January 2010 an estimated £11 million ($17 million, €13 million) were generated from sales for the charity.