All the Books and PDFs and free printable versions you could find everywhere and from anybody. If we are missing something, please submit a resource, thank you.
Interaction Design Foundation
UX Design Articles and Books
The Interaction Design Foundation
Independent Authors
Design
Change by Design: How Design Thinking Transforms Organizations and Inspires Innovation by Tim Brown
goodreads
Design for the Real World: Human Ecology and Social Change by Victor Papanek
goodreads
Universal Principles of Design: 100 Ways to Enhance Usability, Influence Perception, Increase Appeal, Make Better Design Decisions, and Teach Through Design by William Lidwell
goodreads
The Laws of Simplicity: Design, Technology, Business, Life by John Maeda
goodreads
The Laws of Simplicity / John Maeda
Creative Confidence: Unleashing the Creative Potential Within Us All by Tom Kelley
goodreads
The Art of Innovation: Lessons in Creativity from IDEO, America's Leading Design Firm by Tom Kelley
goodreads
The Artist's Way: A Spiritual Path to Higher Creativity by Julia Cameron
goodreads
Meggs' History of Graphic Design by Philip B. Meggs