[tgvaughan]

The second edition is CC-BY-NC-SA. (This is indicated inside the cover of the print edition.)

[Edited to add NC.]

[kragen]

Oh interesting! Do you have the print edition? The copy on Library Genesis does indeed seem to contain that license, but someone could have added that when they uploaded it to libgen: https://libgen.lc/ads.php?md5=968F60C358A99A61A2A0FD7502F476...

[zerocrates]

The Google Books copy that MIT Press links to as the "Preview" includes the CC license:

https://mitpress.mit.edu/books/structure-and-interpretation-...

https://books.google.com/books?id=a4-pBgAAQBAJ&lpg=PP1&pg=PP...

[kragen]

So it does! Thank you very much!