> 33 Strategies of War
> 48 Laws of Power
I keep going back to it because it applies in almost every conflict in life, from competitors to personal relationships to office politics. It's also very entertainingly written.
> The Checklist Manifesto
I know it cover to cover but someone impressive always keeps recommending it and I go back for a reread. Alas, it isn't very practical for a software engineer, where you face different situations daily. I really wish it was because I want it to work.
> Never Split the Difference
Negotiation is a very emotional thing. Most of the time it's simply negotiating with kids or the spouse. This book is completely amazing for it, but a lot of techniques feel unnatural. I brush up to find techniques I was using wrong or simply to remind myself to focus on empathy.
> Deep Work
> Mastery
> Peak Performance
> The Art of Learning
> The Power of Habit
My go to motivational books.