These books will come in handy for you on your journey as a UI/UX designer.
The Design of Everyday Things – Don Norman
Refactoring UI - Adam Wathan
Communicating Design – Dan M. Brown
About Face: The Essentials of Interaction Design - Alan Cooper
Designing with the Mind in Mind - by Jeff Johnson
The Elements of User Experience: User‑centered Design for Web - Jesse James Garrett
Don't Make Me Think - Steve Krug
Lean UX: Applying Lean Principles to Improve User Experience - Jeff Gothelf and Josh Seiden
Hooked: How to Build Habit-Forming Products - Nir Eyal
Smashing UX Design: Foundations for Designing Online User Experiences - James Chudley and Jesmond Allen
Sprint: How to Solve Big Problems and Test New Ideas in Just Five Days - Jake Knapp
Emotional Design - Don Norman
100 Things Every Designer Needs to Know About People - Susan Weinschenk
Well-Designed: How to Use Empathy to Create Products People Love - Jon Kolko