I have a graduate degree in computer science and know some graph theory, but I really liked this. I thought it was interesting, reminded me of a lot of theory, and taught me some more.

I really appreciated the voice and tone. I am very surprised to see people who did not appreciate it and took the time to write how much they didn't like it. (Which is their right).

I am writing this only to let the original author know that there is an audience for this kind of "breezy" explanation.