Fundamentals of DevOps and Software Delivery
https://www.fundamentals-of-devops.com/While most books about DevOps focus only on high-level theory and culture, this practical, hands-on guide focuses on the actual tools, practices, and technologies that constitute software delivery. You'll work through dozens of examples that take you, step-by-step, through how to run real systems and real code, starting with the basics—running a single server—and working all the way up to Kubernetes clusters, automated deployment pipelines, distributed data systems, and more.
Terraform: Up & Running
https://www.terraformupandrunning.com/This book is the fastest way to get up and running with Terraform, an open source tool that allows you to manage your infrastructure as code across a variety of cloud providers. Terraform: Up & Running, now in its third edition, is a hands-on-tutorial that not only teaches you DevOps and infrastructure as code principles, but also walks you through dozens of code examples that you can try at home (you can find all the code examples in the Terraform: Up & Running GitHub repo).
Hello, Startup
https://www.hello-startup.net/This book is the "Hello, World" tutorial for building products, technologies, and teams in a startup environment. I based it off of my own experiences, as well as interviews with programmers from some of the most successful startups of the last decade, including Google, Facebook, LinkedIn, Twitter, GitHub, Stripe, Instagram, AdMob, Pinterest, and many others. If you're at all interested in startups, this book is for you.