My cousin's husband who is a math professor asked for an earlier edition of this as a Christmas gift in our family's secret Santa exchange while I was in grad s

My cousin's husband who is a math professor asked for an earlier edition of this as a Christmas gift in our family's secret Santa exchange while I was in grad school. Since I had drawn him that year, when I saw this on the list I ordered two copies since it sounded cool to me too. Parts of it are still over my head, but it's great reading.