The most dangerous thing about books is that you read them and think you have the "skill"
You have the Knowledge but you don't have the skill.
I was raised on a farm with no indoor plumbing so I have several dormant skills like butchering and crap like that.
I use to take my kids on neolithic camping trips.
The things I found to be true was
1. A lean to is never shown steep enough!!!!!
2. A debrie shelter is never thick enough. Never! you have to add to the damn thing all the time to keep it tight.
3. You can start a fire with a fire bow but you need to find the right wood. Be patient and practice.
4. When it is snowing it is to late to try building a shelter and a fire. You should have spent a few nights in one and built a few before you got yourself in a position to "Survive" in one.
All these skills can be practiced from a book. But you have to practice them or realise you have knowledge but in reality you will have to "learn" the skill.