The Age of Surveillance Capitalism
Shoshana Zuboff
This book really connected the dots for me on how truly powerful Google, Facebook, Verizon are and how much they know about our lives. While there is great potential for technology to add incredible connectivity, feedback, and opportunities, without keeping tech in check it could and will be extremely dangerous for human kind.
Principles
Ray Dalio
Your principles are essentially a framework for which decisions are made. Ray believes that should you use the same framework over and over and perfect his framework you will in return be able to perfect your decision making process.