Some complain of this trilogy, they treat literature for "teen", I personally do not see that it is an evil. P.Pullman and JK Rowling are good authors for teens and adults .... Certainly there sometimes a certain simplicity in relations with religion, but many books "adults" do not necessarily deal better.
History is always very rhythmic and full of surprises. I did not know Maxime Chattam before the first cycle: it is a first-rate storyteller! Hopefully he continues to write SF, which kind it is unfortunately difficult to live in France!