According to the Washington Post, the book’s plot is: 

Jeffery Deaver’s Carte Blanche — the latest installment in the immortal franchise — brilliantly captures Fleming’s bitten-off, occasionally distracted, Boy’s Own style. The opening chapters take us straight into the action. 

A thirty-something Bond is in Serbia, monitoring a nasty piece of work (an Irishman called Niall Dunne) and a dangerous piece of machinery (a train carrying a deadly cargo). When the operation goes wrong, Bond has to escape from the country and get back to London.”

Expect Bond 23 to be in theaters by Halloween 2012.