I remember finding Cliff Stoll's Klein bottle website a number of years ago when I was younger, but of course I didn't remember the name of the person behind it

I remember finding Cliff Stoll's Klein bottle website a number of years ago when I was younger, but of course I didn't remember the name of the person behind it. The concept prompted a lot of interesting geometry-related thoughts. It was surprising to see this come back up while reading about cybersecurity and what sounds like a neat book!