Step 77: Load a Book and Capture It.
Put a book under your platen, and adjust platen height where the platen attaches to the column. You want the platen to rest at the base of the binding, so that it is not pressing harder at the top of the book than the bottom. Unless all your books are the same size, you will need to adjust this for each book.
Start at the beginning of your book and work to the end.
HINT: Sometimes, I run into occasional focus issues -- you can see some of them in the tool book I scanned at the intro. One simple way to deal with these is to keep a "Focus sheet" around. It's just a piece of paper with printed words on it. If you encounter a page that has nothing in the middle for the camera to focus on, before capturing that page, stick the focus sheet over top of it and focus the camera. Remove it, and then release. You'll have a perfectly focused page.