The Guardian 100 greatest non-fiction books

The Guardian came up with the 100 best nonfiction books in 2011.

 They introduced the list, thus: "After keen debate at the Guardian's books desk, this is our list of the very best factual writing ... "

Under the category "Travel" they included The Rings of Saturn by W. G Sebald. Which is really odd since the book is fiction. In several instances the novel is hardly factual at all.