I always recommend the book "Leading Snowflakes" for new technical leads or engineering managers:
http://leadingsnowflakes.com
It gives very concrete advice, and it explains the people side in terms of skills that may already be familiar to you as an engineer -- for example, to "code review" your management decisions with your teammates.
I'm also a big fan of this video on Autonomy without Chaos, by David Singleton. David is one of the best engineering managers I've worked with, and really exemplifies a style of management that's focused on empowering your team from the bottom up:
https://www.youtube.com/watch?v=RKgZmHhSD9I
It's always interesting to come across a book relevant to me and find that it's basically a step-by-step implementation of Nathan Barry's "Authority" guide to writing a book (I mean that in a positive way, the site is very well made).
I'm also a big fan of this video on Autonomy without Chaos, by David Singleton. David is one of the best engineering managers I've worked with, and really exemplifies a style of management that's focused on empowering your team from the bottom up: https://www.youtube.com/watch?v=RKgZmHhSD9I