Update: I just posted a new update on the live link, it's a way to simplify method 23 in the book, so you don't need to type everything manually. It will save you lots of time.
Now a bit more info on method 23, it's one of those treasure hunting kinds of methods in the ones you could strike gold and find hundreds of articles in 5 minutes or you could spend hours going in circles and find nothing, it's fun but it shouldn't be your main content strategy. And again, it has nothing to do with the way back machine, I know everyone and their dogs already know you could go treasure hunting for expired articles on archive.org but that's just one of many places where you could find unindexed free original high-quality content.
If you have bought the book, you should know that from all the treasure hunting methods in the book, method 9 is by far my favorite one and I have filled one of my sites with articles using only that method, as long as your niche is not super hyper-specific, this is one of the best methods and has never been shared anywhere before.