Writers, thinkers and adventurers at this year's Edinburgh Festival add to the Face up to World Debt Photo petition

Doris Lessing one of the most inspirational and radical figures in British literature
and radical journalist and thinker George Monbiot.

Two of Scotland's most successful contemporary authors Ian Rankin and Ian Banks

Intrepid Adventurers and Explorers Benedict Allen and Sarah Wheeler

Playwright Alan Ayckbourn and Joanne Harris - author of bestseller 'Chocolat'