Test Automation on itself should not be a field if you ask me, therefor it is mostly software developers (that value automated testing highly) who write books/articles that drive the field. Because very good software developers are also very good testers.
My personal favorite is Kent Beck and his book Test-Driven Development.
Beck was one of the 17 original signatories of the Agile Manifesto,
the founding document for agile software development. Extreme and
Agile methods are closely associated with Test-Driven Development
(TDD), of which Beck is perhaps the leading proponent.
After nearly 20 years Beck is still experimenting and writing about with new software development test technique's. I like his recent princibles for programmer tests: https://medium.com/@kentbeck_7670/programmer-test-principles-d01c064d7934
James is very active and his Lets code video's are all about how to build a paint/drawing application while automating everything, and starting with tests, also covering automated deployments and build pipelines.
His Python TDD book takes you on a practical journey to automate and build a Todo-list application from scratch. Starting with a failing Selenium test until you automatically deploy to cloud infrastructure. This all with very detailed steps, code and lots of background and learnings.