And *SADDLE* stitched? Really? Like you're supposed to put it on a horse and ride away on it or something? Sheesh!
You've obviously never seen an old saddle stitcher. The books would have to be bound one at a time, and when you would place the book to be bound (or stapled for peter), on the machine, you look like you are putting a saddle on the machine.
Many digital presses have the stuff built in nowadays. Some copy shops and small printers still use them, some newer ones still look and work much the same way.
I think they still make hand held or desktop ones too.