- “Managing Humans” by Michael Lopp aka rands - https://managinghumans.com/

A edited collection of blog posts with other material that does a very good job describing how to tackle the transition from Engineer to Manager.

- “The Truth About Managing People” by Stephen Robbins https://www.pearson.com/us/higher-education/program/Robbins-...

An invaluable “Cliff Notes” style book about many topics (truths) in management. Each topic (“truth”) gets a page or so overview, key points and links to the standard “references”.