When Michel de Montaigne retired to his family estate in 1572, aged 38, he tells us that he wanted to write his famous Essays as a distraction for his idle mind. He neither wanted nor expected people beyond his circle of friends to be too interested.
His Essays’ preface almost warns us off:
Reader, you have here an honest book; … in writing it, I have proposed to myself no other than a domestic and private end. I have had no consideration at all either to your service or to my glory … Thus, reader, I myself am the matter of my book: there’s no reason that you should employ your leisure upon so frivolous and vain a subject. Therefore farewell.