After art college, I got a job as a medical illustrator, and I was pretty good. I had to imagine what was going on in the operations because the photographs just showed a mess.

Stories come to me and I don't know where they come from, but afterwards I can look back and say, 'Oh yes, that's got a little bit of me, or a little bit of my own son in it'. That's where ideas come from.

What excites me about picture books is the gap between pictures and words. Sometimes the pictures can tell a slightly different story or tell more about the story, about how someone is thinking or feeling.

As a father, I understand the importance of the bond that develops through reading picture books with your child.