It's quite unusual for me to read a book about management coming from the US culture and feel it so highly valuable.
Sarah Drasner looks like the kind of person I would definitely like to know and work with, and that's a lot to say XD

Parts 1, 2, and 4 are pure GOLD. You need to carefully read it. Take notes. Reflect on it. Absolutely amazing. Lots of wisdom, lots of humanity, and lots of practical experience.
I confess that some advices in part 3 (the one more into "engineering") sound horrible to me, quite misaligned with the way I understand product development based on software. But still, that doesn't eclipse the rest of the book (which is most of the content).

I would definitely recommend its reading to anyone currently working as Engineering Manager (or any other similar label) or willing to :-)