There are innumerable writing problems in an extended work. One book took a little more than six years. You, the writer, change in six years. The life around you changes. Your family changes. They grow up. They move away. The world is changing. You're also learning more about the subject. By the time you're writing the last chapters of the book, you know much more than you did when you started at the beginning.
David McCulloughHe had kept his head, kept his health and his strength, bearing up under a weight of work and worry that only a few could have carried.
David McCulloughPeople are so helpful. People will stop what they're doing to show you something, to walk with you through a section of the town, or explain how a suspension bridge really works.
David McCullough