Read this book if…
- You’re a new manager
- You’re experienced, but could use a ~yearly calibration of your skills
The Effective Manager, now in its second edition, is my most frequently recommended book to any new manager (and even some tenured bosses). The reason why is apparent within the introduction section:
Most managers are terrible at the most important thing they’re supposed to be doing: getting top performances out of the people they are managing.
As a new manager, I felt both sure of myself and lost. I did not want to admit it to anyone. What this book was offering was precisely what I needed at that point in my career: “Here’s how you do this job”.
The Effective Manager was so impactful to me, that I coordinated a organization-wide “book fairy” program that bought and delivered a copy for every engineering manager (roughly 50 managers across 4 offices). The lessons contained within this book felt so profound, that even a small chance that the manager would actually open the book and absorb some of the lessons was worth the effort.
Action Oriented, Data-Driven
Read enough leadership books and you get a sense of how thin the research can be. Some present an interesting thesis backed only by nominal anecdotes or quotes. They hit the thesis over and over with “trust me” vibes, and the point was made in the first chapter. Not here. While this book makes its point in the intro it spends the rest of the book laying out four distinct pragmatic actions. Out of respect for the craft and the real-world work of management, this book relies on hard research. The 4 sections reinforce each other, and are unique and actionable.
The Management Trinity
Build Relationships With One on Ones
If you’re not doing one on ones (aka, 1-1s or O3s) go buy this book and start. If you are doing them, you still might not be getting the most from them. This is by far the most useful and essential behavior from this book to take seriously and do right to get the most valuable effects. The data that The Effective Manager shows that the most valuable structure that gives you the most results looks like:
- Schedule 30 minutes every week.
- The one on one is mostly for your direct. Skip small talk, let them lead.
- Start the same way, same question, build predictability so your direct can be confident.
- It has 3 part template: Their topics, your topics, the future. You might not get to all three every time, but always start with their topics.
Communicate About Performance (Feedback)
one on ones are table stakes, must do’s. The Effective Manager lays out the case that providing your directs regular and clear feedback is a strong indicator if you’re a top performing manager or not. Like with one on ones, there’s a template for giving feedback that has been cultivated over years of research. While you might develop your own overall style for feedback, knowing that there’s a default to calibrate to can help both new and experienced managers.
Some of the highlights:
- Ask for permission, if they say “no” don’t give the feedback.
- Keep it positive while “installing” feedback and trust.
- Identify specifics about the context and behaviors.
- Don’t overstay your welcome, be prepared to back off.
Read more about how to do SBI feedback.
Ask For More (Coaching)
Continuing to build upon one on ones and Feedback, Coaching is the next layer to add. The book does a good job of laying out the right timing and methods to start pushing your directs for more results in a way that they’ll appreciate. Again, Horstman provides a clear picture of the methods and actions you can take and the data that backs up the “why”.
Push Work Down (Delegate)
The fourth core behavior is one that provides a win-win scenario for you and your direct. Being able to offload parts of your work to your directs both frees you up to do more and different work in the organization, but also gives your direct opportunity for upward mobility and responsibility. For example, delegating a recurring report not only frees your time but gives your direct visibility with leadership.
Summary
The Effective Manager is the most practical guide I’ve found for managers at any level. Instead of vague leadership platitudes, it delivers a clear framework: One‑on‑Ones, Feedback, Coaching, and Delegation. These actually work. It’s the only book I’ve bought in bulk and I recommend to every manager I’ve led.
