[yogsototh]

It was already known that a simple Markov Chain was used to detect another author had written a chapter inside a book. It was in 2003 I think, unfortunately I cannot find a reference about this. Just to tell that Markov chains are a very basic and old ML method quite efficient for this kind of task.

[nothrabannosir]

In 2002 a Dutch newspaper discovered newcomer Marek van der Jagt to be Arnon Grunberg, a famous Dutch writer. They sent some blind samples of various writers to a research centre in Italy, who matched the two.

https://www.nrc.nl/nieuws/2002/05/11/grunberg-is-van-der-jag... (2002)