[2022] Hey I won't get sued if I steal this concept for a book right?

We have some pretty strict guidelines in place for fan created content, they also must be non money making.
https://support.deadbydaylight.com/hc/en-us/articles/4437901307668-General-Guidelines-on-Fan-Created-Content

You can find more information using that link, and if you have further questions you can direct them to the appropriate department via our Customer Support team.