On this week's Book Club podcast we're celebrating the 100th anniversary of a landmark in children's publishing, When We Were Very Young — which represented the first collaboration between A A Milne and E H Shepard, who would (of course) go on to write an illustrate Winnie-the-Pooh. Sam Leith is joined by James Campbell, who runs the E H Shepard estate. He tells Sam how the war shaped the mood and success of that first book, why Daphne Milne's snobbery and ambition left Shepard out in the cold, what happened to Christopher Robin... and how Pooh became Pooh.