There are many books and articles on how a project must be led. In the Agile Zone, you'll find many articles related to how to handle projects, organization, teams, products, etc.
But, there is a subject that is often poorly covered, or covered too late, application security. If for example, you look at the Safe framework, you have a lot of actors from the most business to the most functional, but no word about the contributions of security experts! There is DevSecOps, but unfortunately, this concept is much less widespread than DevOps. I would say, to be sarcastic, that you have to be in a company sincerely concerned with DevOps and security to hope to find DevSecOps.