Ever pushed on a door that you were supposed to pull open? Been unable to find a light switch? It's not your fault! Something about the design of these objects and situations did not allow you to intuit the correct way to use them. Don Norman uses examples like these to explain how we learn to use the world around us (defining terms like cognitive mapping, and system image) so that designers may consider these principles and avoid points of friction before products and services make it out into the world. 'The Design of Everyday Things' is a foundational text for anyone wanting to practice UX, in any setting.
Everyone these days MUST have a website. Steve Krug's 'Don't Make Me Think" is all about websites and a pivotal book in your UX training. Learn how users read websites, how they navigate through them and how much effort they're willing to go through to see their mission accomplished (hint: not much). This book is for anyone who works on your website, whether they be designers, managers, or content creators, everyone benefits from the theory and examples explained in this book.
UX is also words, and words are a powerful tool. Use the right ones with this powerful guide by Nicole Fenton. Whether you're a one-person blog, or a large institution 'Nicely Said' helps you find the voice, tone, and style right for your organization, and your audience. Incorporate these tips and tricks into your style guide - if you don't have one, this book helps with that too - and you'll be well on your way to crafting great, usable content in no time at all.
The Human-Computer Interaction Handbook: Fundamentals, Evolving Technologies, and Emerging Applications is the largest, most complete compilation of HCI theories, principles, advances, case studies, and more that exist within a single volume. The book captures the current and emerging sub-disciplines within HCI related to research, development, and practice.