'No, no, sir, that will not do. You are good-natured but not good-humoured. You are irascible.' The friendship between the great lexicographer and his pleasure-loving Scottish biographer is one of the most celebrated in literary history. Drawing on everything they wrote to and about each other, this study charts the warm, complex and often competitive relationship of this oddly matched pair, from their first meeting in 1763 to the publication of Boswell's Life of Johnson in 1791.