Lonely Planet recently launched a new range of city guides, called the Encounter Series.
The pocket-sized versions of their country guide counterparts aim to give an overview of 8 cities - Barcelona , Hong Kong , Istanbul , Las Vegas , London , New York , Paris and San Francisco.
They have organised the guides by neighbourhood, helping visitors to get to the "heart of the city".
Yahoo Travel is running a promotion where first prize is two Eurostar tickets from London to Paris, Lille or Brussels, and 10 runners up receive sets of the new Encounter Series.
I'm planning to visit Turkey next year, so I shall check out the Encounter Guide to Istanbul.