add 4 new books, update readme

Hey! 👋

I wanted to suggest some books that I have found invaluable and recommend on a regular basis! Thanks for putting this together!

Books:

Quiet Leadership:
- Improving the performance of your employees involves one of the hardest challenges in the known universe: changing the way they think.
- https://www.amazon.com/Quiet-Leadership-Steps-Transforming-Performance/dp/0060835915
HBR's 10 Must Reads on Managing Yourself:
- If you read nothing else on managing yourself, read these 10 articles (plus the bonus article “How Will You Measure Your Life?” by Clayton M. Christensen). We've combed through hundreds of Harvard Business Review articles to select the most important ones to help you maximize yourself.
- https://www.amazon.com/Managing-Yourself-Measure-Clayton-Christensen/dp/1422157997
Originals- How Non-Conformists Move the World:
- The #1 New York Times bestseller that examines how people can champion new ideas—and how leaders can fight groupthink, from the author of Give and Take and co-author of Option B
- https://www.amazon.com/Originals-How-Non-Conformists-Move-World/dp/0525429565
What Every Body Is Saying:
- Read this book and send your nonverbal intelligence soaring. Joe Navarro, a former FBI counterintelligence officer and a recognized expert on nonverbal behavior, explains how to "speed-read" people ...
- https://www.amazon.com/What-Every-BODY-Saying-Speed-Reading/dp/0061438294

ryanburgess / engineer-manager