What is your writing process?

As I wrote in the 'Backstory' - I never planned on writing a book - the scenes came to me in flashes in my mind as if I was watching a movie. I tried to ignore them but they kept on coming until I grabbed a pen and wrote them down. They didn't even come in sequence - I had to fit them together as if building a puzzle - then come up with scenes to connect what I was imagining. I know it might sound strange, but that is how it began. Even now, as I'm writing the third installment, scenes randomly come up that I know need to be a part of the book, and my job is more to connect everything together in a cohesive story.