Jan van Mersbergen: 'As thriller writer Frederik Baas, I feel freer'

We know him from such wonderful novels as To the Other Side of the Night and The Last Escape, but Jan van Mersbergen has more to his credit. He recently surprised us with The Rider, written from the perspective of an old horse, and now there is Diary from the River. Not a novel, but his first thriller, published under the pseudonym Frederik Baas. 'I was curious to see if I could write something like this.'
Puzzle piece
Diary from the River is an exciting novel. But why call it a th...