Even if a novel is unlikely to have great commercial value, I see a great benefit to short term copyright that provides meaningful but limited control over the work to the creator. It's difficult to know what will be valuable in advance.

Now, the current copyright of "life of the author plus seventy years, and oh, wait, is that expiring? on second thought, let's go ahead and add another fifty years unless we decide to go ahead and tack on another fifty years at some point in the future"... that is utterly unjustifiable.

But keep in mind, even the EFF put out a comic satirizing both extremes IP protection ("information, like, wants to be free").