The authors of the books didn't get anything because this article is an April fools joke ("Update: April fools" at the bottom).

Hypothetically if it were a real scheme, it doesn't seem like it'd displace a sale given the summaries are only for books the library has already bought.

From the article:

> Tuesday, April 1

But it's... believable, plausible. Well let's hope it's an April-first thing...