My son got us a gift of a subscription to this website. It asks questions and you type in the answers and it makes a book out of what you write. I'm working on one for just my self, but we've also opened one for our whole family. I think we've got about 20 relatives all involved answering questions and uploading documents.
It's like a little miracle... anyone can do it. Write a book that is. It's really simple and, after all these years of people telling me I should write a book... I am!