How is Factbook customizable? I was told that it was today by a video on it online but do not know what the author of the video meant. I like to use Factbook as my basis starting point in research studies. It is very broad yet casually effective. I understand that the different workflows and guides can be customized to include collections of books and articles. This in turn allows the person to see what their library has to say about the subject that would otherwise be missed in research.