Michael Morpurgo has been writing children's books for 25 years, but it was the stage and film versions of his book "War Horse" that rocketed public awareness of his work.
At the end of the link below you'll find a BBC interview with him, conducted by students from a school in Plymouth. He talks about using names of people he meets, why the stage version of "War Horse" is more intense, and being Children's Laureate.
You can see the interview here: http://www.bbc.co.uk/news/entertainment-arts-17382092
(Would would you like to have Mark Twain as your writing coach? How about Anton Chekhov or Jane Austen? You'll find their advice about writing in my newest book, "Your Creative Writing Masterclass," published by Nicholas Brealey and available from Amazon or your other favorite book seller.)