The story of how Michael Morpurgo's children's novel became one of the most popular and acclaimed productions in the National Theatre's history. The story of how Michael Morpurgo's children's novel became one of the most popular and acclaimed productions in the National Theatre's history. The story of how Michael Morpurgo's children's novel became one of the most popular and acclaimed productions in the National Theatre's history. The story of how Michael Morpurgo's children's novel became one of the most popular and acclaimed productions in the National Theatre's history.