@IngaLovinde @futurebird ah that book went viral in France a few years back. It's actually pretty good.
Note: the author goes a bit into pseudo sciences stuff in his "encyclopedia about everything", but to be honest I think the first book is worse a read. I remember he did also did a movie about aliens capturing humans and treating them like we treat animals.
For your question: the author is Bernard Werber (Albin Michel is the editor)