I've had time to do a lot of reading lately.
Right now I am reading the Alex Cross series by James Patterson. In the dedication in one of his early books (pre 2000) he mentions that his fans want him to write faster. He must have figured it out, because now he can release at least 1 book a month. I think he uses co-authors to do most of the work, just like Michener did. Michener just never gave his co-writers any credit, and I think that's because his co-writers were his students. I could be wrong on this because I don't know where the person that told me this got his information and I never followed up on it.
Some earlier books have been enjoyable to read because there is no mention of cell phones or computers. If there is a computer, it's usually large and heavy and takes up an entire surface, like a table or desk. With the JD Robb books, because they are in the future, almost everyone has a wrist unit and kitchens are a thing of the past, with machines doing all the work, sort of like a microwave. You program what you want to eat or drink onto a screen, and you open the door and there's the food or drink.