Then one day I thought it would be wonderful to make a whole book, to make my text and my drawings together, and that's how I started doing children's books.

When I make a book, I make it for the child and not for the parent - no jokes in it for the parents!

But we discovered that, although I liked publishing, the commercial side meant nothing at all to me.

Each book first begins with a little idea.

I thought it would be very nice to become Picasso or Rembrandt, or a van Gogh.

I did about 2000 covers altogether, for all sorts of books - from Shakespeare to James Bond - and I always had the idea that I must give 100%, no matter who the author was.

My father realised that for me to become a publisher in his firm would have been the end of the firm!