The accompanying book to "Nigella Express" was released in the UK in September 2007, US in November 2007, and in Australia in 2008. Sharing the same name as the television series, the book became another best-seller in the UK, and was outselling television chef Jamie Oliver by 100,000 copies, according to Waterstone's. It was reported that over 490,000 copies had been sold by mid-December in the UK. Furthermore, the book was number one for a period on Amazon UK's best-selling books, and was ninth on their overall list of Christmas best-sellers in any category. Paul Levy of "The Guardian" wrote that the tone of the recipes was "just right. One of the appealing things about Nigella's brief introductions to each of them is that she thinks not just as cook, but as eater, and tells you whether they're messy, sticky or fussy." In January 2008, Lawson was estimated to have sold more than 3 million books worldwide. Her Christmas book was released in October 2008 and the television show in December of the same year. An American edition of the book "Nigella Christmas" with a different cover photograph was released in November 2009 with an accompanying book tour of several US cities and a special on the USA's Food Network.