Matt Frei presents Americana, Radio 4's insider's guide to the people and the ideas shaping the United States today.

Richard Hammond, founder of Greentraveller.co.uk, presents his guide to Green London, from organic pubs, shops and markets to 'Boris biking' along the Thames.

The Telegraph's experts present their guide to London's best hotels, restaurants, attractions, shopping and nightlife.

The Hartford, one of the leading sellers of annuities, offers a fair bit of good information here, and MetLife, another leading purveyor, presents its own guide to deferred and immediate annuities as well.

Mr. Severgnini presents his guide as a tour that is partly geographical and partly conceptual.