The Rembrandt Affair, the newest Daniel Silva book, has been released. Amazon has it for the Kindle, but not here for the nook yet. The author mentions on his Facebook page that it will be available for the nook.
Give it a day or two. For some reason, B&N tends to lag a day or two behind on some new releases. Although in looking the only other site, besides Amazon, is ereader, so I wonder if it is a publisher thing?