A New Edition Of The Final Anne

Penguin Canada is publishing the final Anne of Green Gables with more than one hundred pages that were left out when it was originally published in 1974. The writing was completed in 1942.

And then not published for over thirty years. Hmmm. Were people not into Anne at that point? Was the book considered a lesser work? L.M. Montgomery died shortly after she completed it. Is it true that interest in authors plummets after their death?