Collecting the best books mentioned on hacker news, reddit and other places
While UI/UX is more of a field where you get better by practice and observation, yet these books can surely help you build a solid foundation.
Some great books- immerse in it for rapid learning
Don't Make Me Think, Revisited: A Common Sense Approach to Web Usability (3rd Edition) - http://amzn.to/2e5Erfc
Design for Hackers: Reverse Engineering Beauty - http://amzn.to/2euMOUc
UX Design and Usability Mentor Book : With Best Practice Business Analysis and User Interface Design Tips and Techniques - http://amzn.to/2dXYZJT