I read the article and it has nothing to do with too many books being written or basically any of the other comments here.

It is a very interesting story about a man spending increasingly more time in darkness, the experiences he has there, his return into the real world and how it influenced his work and how he is now helping others to have similiar experiences.

PS: reloading the page in Firefox' reader mode showed it in full to me. Go to reader mode and then reload if you only see part of the article.