Khaled Hosseini said this quote

“ It's basically an act of faith, hoping that a small idea will unspool into a bigger whole. Sometimes, in fact often, it doesn't and it just runs out of steam. The hope for me is that it will snowball. the best way to put it is that I have no particular method or technique per se, other than this: I plan nothing, I outline nothing, I start with an idea or an image or a line of dialogue and see where it leads me. Because I never know what the next page will contain, let alone the end of the book, I am perpetually surprised by the course that my characters take. The writing process is as full of surprises and twists for me as the reading experience is for my readers. I love the spontaneity of writing this way, the possibilities left open, the feeling that I am not constrained or committed to any given path. Every day, I am surprised by something. It may not be the most efficient way of writing, but it has served me well thus far. ”