I Myself, As I'm Writing, Don't Know Who Did It. The Readers And I Are On The Same Ground. When I Start To Write A Story, I Don't Know The Conclusion At All And I Don't Know What's Going To Happen Next. If There Is A Murder Case As The First Thing, I Don't Know Who The Killer Is. I Write The Book Because I Would Like To Find Out. If I Know Who The Killer Is, There's No Purpose To Writing The Story.