While Germany went a bit bonkers with their own merch, France actually did their own series of five books for Trollhunters! Since was asked about them now seems as good a time as any to make a post about it.
These were published by Bibliothèque Rose et Verte which is a children's book line that are banded by age and gender kinda? Books are separated into two different categories (Bar a new one that seems to have appeared which is it's own thing) with the paler the colour, the younger the targer audience, and the darker the colour the reverse. Think the best way to explain is to screenshot directly from their website how the system works:
Each book has their banding very clear on the spine which as you can see from these two series graphucs, Chasseurs de Trolls is firmly in the mid range section. While toned down a bit (Age range), they largely follow the episodes they're based on and don't fall into fluffy canon as a result.
If you're wondering how big we're talking here's Volume 1 with a Switch cartridge for scale. Perfect for small hands. The front of each has simple bio pages about various characters with Jim referred to as James and Jimmy and AAARRRGGHH being shortened to ARGH which is fair honestly. All the books can be found on Amazon, ebay is always a good bet and weirdly enough some libraries also stock them!
The first volume, Un nouvel êlu, is by far the easiest of them all to track down and being aimed at the 8-10 age bracket, very friendly if your French isn't great. That Amulet image was also seen on a Best Buy poster which has reappeared for some reason much like Bular looming on low opacity.
