General Visual Design
The Non-Designers Design Book - Robin Williams
The New Drawing on the Right Side of the Brain - Betty Edwards
Sketching User Experiences - Bill Buxton
Universal Principles of Design - Betty Edwards
D.I.Y.: Design It Yourself - Ellen Lupton
Design for Hackers: Reverse Engineering Beauty - David Kadavy
Boostrapping Design - Jarrod Drysdale
Elements of Design - Gail Greet Hannah
Form+Code in Design, Art, and Architecture - Casey Reas
Geometry of Design - Kimberly Elam
Paul Rand: A Designer`s Art - Paul Rand
Graphic Design
How to be a Graphic Designer, Without Losing Your Soul - Adrian Shaughnessy
Graphic Design Manual - Armin Hofmann
101 Things I Learned in Architecture School - Matthew Frederick
Designing For Social Change - Andrew Shea
Graphic Design Theory: Readings from the Field - Helen Armstrong
Graphic Design Thinking - Ellen Lupton
The Elements of Graphic Design - Alex W. White
Design Principles
Universal Principles of Design - William Lidwell
The Laws of Simplicity - John Making-Breaking-Grid-Graphic-Workshop
Things That Make Us Smart - Donald A. Norman
Emotional Design - Donald A. Norman
Visual and Statistical Thinking - Edward R. Tufte
The Art of Color - Johannes Itten
Less and More: The Design Ethos of Dieter Rams - Klaus Klemp
Dieter Rams: As Little Design as Possible - Sophie Lovell
Typography
The Elements of Typographic Style - Robert Bringhurst
Thinking with Type - Ellen Lupton
Stop Stealing Sheep and Find Out How Type Works - Erik Spiekermann
Inside Paragraphs - Cyrus Highsmith
My Way to Typography - Wolfgang Weingart
Lettering & Type - Bruce Willen
The Complete Manual of Typography - Jim Felici
Grids / Layouts
Making and Breaking the Grid - Timothy Samara
Grid Systems - Josef Muller-Brockmann
Visual Grammar - Christian Leborg
Grid Systems: Principles of Organizing Type - Kimberly Elam
Interaction Design
User Interfaces for All - Constantine Stephanidis
Handbook of Human Factors in Web Design - Kim-Phuong L. Vu
Advertising
Ogilvy on Advertising - David Ogilvy
Confessions of an Advertising Man - David Ogilvy
The Copywriter's Handbook - Robert W. Bly
Advertising Concept Book - Pete Barry
Hey, Whipple, Squeeze This - Luke Sullivan
Web Design
Designing for the Web - Mark Boulton
HTML and CSS: Design and Build Websites - Jon Duckett
Indie Publishing: How to Design and Publish Your Own Book - Ellen Lupton
How to Make Books: Fold, Cut & Stitch Your Way to a One-of-a-Kind Book - Esther K. Smith
UX/UI
The Design of Everyday Things - Donald A. Norman
Don't Make Me Think - Steve Krug
Step by Step UI Design - Sacha Greif
The Humane Interface - Jef Raskin
Contextual Design - Hugh Beyer
Designing Interfaces - Jenifer Tidwell
Rocket Surgery Made Easy - Steve Krug
Apps
App Design Handbook - Nathan Barry
Designing Web Applications - Nathan Barry
Marketing
Tribes: We Need You to Lead Us - Seth Godin
Influence: The Psychology of Persuasion - Robert B., PhD Cialdini
Information Visualization
Information Graphics - Sandra Rendgen
Envisioning Information - Edward R. Tufte
Visual Explanations - Edward R. Tufte
The Visual Display of Quantitative Information - Edward R. Tufte
Information Visualization - Colin Ware
Inspiration
The Art of Looking Sideways - Alan Fletcher
100 Ideas that Changed Graphic Design - Steven Heller
Beware Wet Paint - Alan Fletcher
Also see gifts for designers.