1. First You Write a Sentence by Joe Moran - https://amzn.to/3m2Hq8N
2. Reading Like a Writer by Francine Prose - https://amzn.to/3dEXY3M
3. On Writing: A Memoir of the Craft by Stephen King - https://amzn.to/3mfLFhF
In terms of technical content, there is a course for technical writers on pluralsight - https://www.pluralsight.com/courses/technical-writing-softwa...