Book Of The Week

I just finished reading The Joy of Pi by David Blatner and it really lived up to its name. It was so fun to read. Blatner cleverly compiled every interesting fact, joke, puzzle, poem, cartoon and side note having anything to do with π.

One example: 2π times the diameter of an elephants foot = the height of the elephant. (I want to know who figured this one out, and how.)