Great change always comes down to the actions of a single person.

I am a writer (and one day I'll be an author). For a long time I was a bookseller (who wrote) or a TV producer (who wrote), but for the last decade or so, its been "writer."

I wanted to be a librarian from a very young age. Some of my earliest memories are being taken to the local library. I ended up working as a bookseller. Becoming a writer was the logical offshoot of being a reader.

I've published over 100 books - and that is divided about 50/50 adult and young adult. Lately, I have been writing more YA, which is such a great genre to write it. I don't have a favourite (I usually say it's the last book I've written), but certain books do stick in the mind. My very first YA novel, The Children of Lir, will always be special to me, and, of course The Alchemyst because it was a series I'd wanted to write for ages.

I have a huge music library and deliberately choose the piece of music to match the piece I'm writing. So, every book I write has its own "soundtrack."

I published my first book in 1982 - a collection of Irish folklore called Irish Folk & Fairy Tales. It is still in print today. My first young adult book was published a couple of years later, and I've been writing in both genres ever since.

In my experience, we only ever regret the things we have not done.