Book excerpt: This year's Best Australian Essays ranges far and wide. There are portraits of Michael Jackson, Samuel Beckett, the kookaburra, Julia Gillard and Charles Darwin. There are dazzling pieces on commerce and cricket, extinction and translation, perfume and politics. There are journeys through landscapes scorched and recovering, and reflections on turning points both public and deeply personal. For Robyn Davidson, the best essays 'put oneself and the world to the test.' Here is a collection of pieces that do just that - and also entertain, inspire and provoke.