Thatcher aside, the year’s most entertaining biography is Orson Welles: One-Man Band the third and probably final volume in Simon Callow’s study. This wonderfully vivid account of Welles’s tireless exploits in theatre, radio, film, television and even ballet is compulsive reading. Only an actor, director and writer as gifted and ebullient as Callow could have found the nerve to do this. Callow becomes Welles and, strangely, Welles almost becomes Callow. The only mystery is why, in Welles’s centenary year, his publishers waited until the end of 2015 to release such a tour de force.