Scrolling down on its Amazon page, it's described as a limited edition book. Now, it's most likely out of print, so the few copies around will be priced as rare books. Unfortunately.
Indeed, oh well, I have seen the same books and quantity of books at the same price for over for 6 months or longer. Maybe I will run into a copy one day for 30 or so dollars.
If you have a seller of used books nearby, they may have channels to search for it to see if they can find it for a reasonable price. It must be rare now!