It's insane to be a writer and not be a reader. When I'm writing I'm more likely to be reading four or five books at once, just in bits and pieces rather than subjecting myself to a really brilliant book and thinking, "Well what's the point of me writing anything?" I'm more likely to read a book through when I take a break from writing.

I find writing extremely difficult. I usually have to drag myself to my desk, mainly because I doubt myself. And it's getting harder because I want to improve with every book.

I look at my first books and am glad they weren't published.... You start writing by imitating your heroes, then you keep the heart of that worship in your work. As time goes by, you get other influences and find your own voice.

It's the first time I've been really worried. It's the first time I've written a book and thought, 'Can I do a better book?' I don't know if I can.

I've got every Dr Seuss book there is. Everything was red, like the sky was on fire. That was a memory that I could see really clearly as a child, a very visual image.

To me the question is always this: if a ray of light came out of the sky and said, "Your next book will never be published - would you still write it?" If the answer is yes, the book is worth writing.

I wanted to tell the book thief many things, about beauty and brutality. But what could I tell her about those things that she didn't already know? I wanted to explain that I am constantly overestimating and underestimating the human race-that rarely do I ever simply estimate it. I wanted to ask her how the same thing could be so ugly and so glorious, and its words and stories so damning and brilliant.

Don't be afraid to fail. I fail every day. I failed thousands of times writing The Book Thief, and that book now means everything to me. I had many doubts and fears about that book, but some of what I feel are the best ideas in it came to me when I was working away for apparently no result. Failure has been my best friend as a writer. It tests you, to see if you have what it takes to see it through.