The book Advances in Nature-Inspired Cyber Security and Resilience is an ambitious but largely speculative collection of academic experiments trying to borrow concepts from biology for cybersecurity. While the underlying resilience principles (adaptivity, diversity, redundancy) are sound, the research remains mostly theoretical and poorly translated to operational use. The algorithms look good in simulation but fail in real environments with real constraints. It’s more a showcase of potential than a set of deployable solutions. Insightful, yes, but still speculative: interesting to read, not ready to run.