DAVID SADTLER - Strategy consultant and author Sadtler asks 'How big is too big?', referring to the scale of companies rather than challenging climbs (an avid walker, he's pictured here in the Bernese Oberland). He tackles the size issue further in his new book, Too Big? The growing doubts about corporate scale.
DAVID BAIN - Wealth-Bulletin.com was set up by Bain six months ago, billed as an essential read for the wealthy and those who serve them. He'd like to see himself appearing on its pages one day, as a Web 2.0 millionaire. Here, he looks at Britain's recent wealth explosion and the financial industry that services it.
EMMA DE VITA - Writing this month's feature on trust, MT's De Vita delves behind the headlines to uncover why loss of trust hit organisations like the BBC and Northern Rock so hard. She wonders that a broadcaster can be so concerned about trustworthiness that heads roll over the naming of a TV kitten.
CHRIS COEKIN - Ten years ago, Coekin won an Observer photographic award, which gave him his break into editorial work. Now he has photographed Guardian boss Carolyn McCall for our cover. He has just published a photo book, The Hitcher (Walkout Books, £25), documenting six years' hitchhiking around the UK.