I get the sense that the word rare shouldn't be used here.
Rather this is a nicely presented collection of documents, emails and books that the author thinks are worth looking into.
Maybe undervalued would work better?
Rather this is a nicely presented collection of documents, emails and books that the author thinks are worth looking into.
Maybe undervalued would work better?
"a collection of interesting tech books and docs that most people haven't read or even heard of"
or
"a collection of tech books and docs that i find interesting"