The article by Martin Fowler that popularized the terms, and is still highly relevant today: https://martinfowler.com/articles/continuousIntegration.html
The book on CI/CD (by Jez Humble and David Farley, published 2010): Continuous Delivery: Reliable Software Releases through Build, Test, and Deployment Automation https://www.amazon.com/Continuous-Delivery-Deployment-Automation-Addison-Wesley/dp/0321601912
- Breakthrough book that is about how to treat the entire software lifecycle as a single process, and one that can be automated.
The Phoenix Project is a Thriller Novel about IT & DevOps https://www.amazon.com/Phoenix-Project-DevOps-Helping-Business/dp/0988262592
- https://en.wikipedia.org/wiki/The_Phoenix_Project_(novel)
- Note: In November, “Unicorn Project” will be released: https://www.amazon.com/Unicorn-Project-Developers-Disruption-Thriving/dp/1942788762/
DevOps Handbook - similar authors (Gene Kim et al) and material as Phoenix Project, but in non-fictional form (and a bit deeper): https://www.amazon.com/DevOps-Handbook-World-Class-Reliability-Organizations/dp/1942788002, http://itrevolution.com/devops-handbook
Accelerate: The Science of Lean Software and Devops: Building and Scaling High Performing Technology Organizations, by Nicole Forsgren Phd, Jez Humble, Gene Kim: https://www.amazon.com/Accelerate-Software-Performing-Technology-Organizations/dp/1942788339
2019 State of DevOps Report https://cloud.google.com/devops/state-of-devops/
Site Reliability Engineering https://landing.google.com/sre/books/
Guide to Trunk-Based Development https://trunkbaseddevelopment.com/
Release It!, by Michael Nygard https://pragprog.com/book/mnee/release-it
Lean Software Development: An Agile Toolkit, by Mary and Tom Poppendieck https://www.amazon.com/Lean-Software-Development-Agile-Toolkit/dp/0321150783
Sam Newman, Design, Build, Ship: Faster, Safer Software Delivery https://www.amazon.de/Design-Build-Ship-Software-Delivery/dp/1491984872/