TLDR; Has nothing to do with R (barley mentioned, pamphlet title is clickbait). Advocates (and teaches) Scheme for computational intelligence. Might be satire,

TLDR; Has nothing to do with R (barley mentioned, pamphlet title is clickbait). Advocates (and teaches) Scheme for computational intelligence. Might be satire, or might be a tutorial on Scheme ... I honestly don't know. Ends with the line "$ chmod -R 666 /" making me lean towards satire/intelligent trolling. Is nicely typeset.