Bruce Sterling says buy three. And also:
"If this tome becomes as big a hit as its spiritual ancestor the WHOLE EARTH CATALOG, we can accelerate the change to a high-tech green 21C by years. Furthermore, even though it's reasonably priced, it comes in a gorgeously designed Stefan Sagmeister slipcase that looks really classy, so your gift recipients will not feel politically and culturally manipulated but will be all impressed by your good taste.)"
So there. Why not?