Watermark Books is a great, new bookstore within King’s Cross Station. It is located at the far end of the station next to the Harry Potter Platform 9 ¾. Despite the business of the station and the queues of haggling tourists at the Platform 9 ¾ sign, Watermark Books provides a relaxing environment to browse new and classic books, and they also sell good staples like headphones for your train journeys, too. I enjoyed browsing here while waiting for me train!