To anyone interested in obtaining the other two posters in the series (UNIX Views & UNIX Feuds) here is some information from Marshall Overacre, son of the author:

> "This poster is extremely rare. My father illustrated this series. He was not happy with the quality of the posters and inadvertently made them rare by throwing them all away. He still has the other two-a small handful that he is willing to sell." [0]

> "This is my father’s artwork. Believe he still has some to sell. I can’t recall which of the pictures he was not happy with the posters and threw almost all of them away. One of them is very rare." [1]

> "This is my father’s artwork. Believe he still has some of these for sale. He will sign if you’d like." [2]

[0]: https://www.youtube.com/watch?v=dfGV-jBxizU

[1]: https://www.youtube.com/watch?v=p6mGUT4vcIg

[2]: https://www.youtube.com/watch?v=IGKzuP3GYRM

Here is also some Reddit threads from people wanting to obtain copies:

https://www.reddit.com/r/linux/comments/ifmoua/ive_finally_f...

https://www.reddit.com/r/unix/comments/20cj6h/unix_magic_any...

https://www.reddit.com/r/unixporn/comments/91ntoh/oc_unix_ma...