What are the best Books for DevOps Engineering?

First, there is no such book that will give you exactly everything that you need to know, but there are books that can provide you a lot of knowledge & then you will be able to figure it out yourself that what precisely is it that you need & then you can find what you are looking for.

But to give it a jump-start, you can refer to some of the books mentioned below:

I. “The DevOps Handbook: How to Create World-Class Agility, Reliability, and Security in Technology Organizations”
Text by “John Willis”, “Patrick Debois”, “Jez Humble”, & “Gene Kim”

II. “The Phoenix Project: A Novel About IT, DevOps, and Helping Your Business Win”
A novel by “Gene Kim”, “George Spafford”, and “Kevin Behr”

III. “Accelerate: The Science of Lean Software and DevOps: Building and Scaling High Performing Technology Organizations”
Book by “Nicole Forsgren”, “Jez Humble”, and “Gene Kim”

IV. “DevOps for Developers”
Text by “Michael Hüttermann”

V. “The DevOps Adoption Playbook: A Guide to Adopting DevOps in a Multi-Speed IT Enterprise”
Book by “Sanjeev Sharma”