Explorations Beyond the Threshold

/ʌˈpɑk.ɹə.fə/
noun
[1] (plurale tantum): Certain writings which are received by some Christians as an authentic part of the Holy Scriptures, but are rejected by others.
[2] (obsolete): Something, as a writing, that is of doubtful authorship or authority; formerly used also adjectively. – John Locke.
[3] (modern): Early twenty-first century. A collection of writings and essays connected through common themes of philosophy, artificial intelligence, science fiction, and quantitative investing. Treated as Gospel by some, and heresy by others. – T. Hayes