Top positive review
Hard cover does not crash my kindle.
January 25, 2020
Great addition to library in my math classroom. Best thing is the hard cover does not cause my kindle to crash. Well...guess it would if I hit it hard enough. In reality it is a great book. Was upset that my son ripped the slip cover before I was able to get home, but the embossed pi spiral On the cover actually looks better than the slip cover.