This book is about the famous State of DevOps Reports; some kind of recap from years 2014-17. In this blog post I've summarized what are the impacts of continuous delivery according it. "Continuous delivery improves both delivery and performance quality."
I recently read a great book The DevOps Handbook by Gene Kim et. al. (must read for every developer!) where I first time read about heroic efforts and why they are bad things. Even if I had faced them before this was the first time I realized them and that they block automatic deploys. Start to decrease your heroic debt from today to automate you deploys.