
Norman is ace. Although his books turned me into a usability weirdo unable to switch off my usability sensors... be careful! :-)
As is Raskin - whose interface "notation" (click-drag-click etc) I think isn't talked about enough.
Can I also throw in these...
Don't Make Me Think: https://www.amazon.co.uk/Dont-Make-Me-Think-Usability/dp/032... - I found this a REALLY useful book, and great to share with people too.
A Pattern Language https://www.amazon.co.uk/Pattern-Language-Buildings-Construc... - OK, this is a bit esoteric, but it's so valuable and lots of geeks/UX-ers kind of aim to create their own pattern language as opposed to a UX-dogma.
Information Architecture https://www.amazon.co.uk/Information-Architecture-Beyond-Lou...
Visual Language https://www.amazon.co.uk/Visual-Language-Global-Communicatio... - a kind of fundamental - hard to find.
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There are dozens of methodologies to learn, and put into practice. I would put it that you don't really learn UX, you do it, and revise - in order to solve problems and make things better. Once you've digested some of the ideas you need to start trying the methodologies out. This is harder than it sounds. Even companies that claim to support UX, sort of bugger things up.... in that UX can't "fix" crap... it needs to be in at the beginning.
My favourite activities / methodologies, that produced REAL results were
* Ethnography - kinda just hanging out and observing what actually goes on. One client used to print off every page to proof read their changes cos the font sizes were designed by 21 year olds and they were 60+. The applause I got for raising the font size would never have been found any other way than sitting in the corner. * Card sorting - often collaboratively with armfuls of post its to decide on categories/navigation * Wireframing - I had less success with paper prototyping, but still ... * Personas + Use Cases
...and Eye Tracking - which tbh was SO VALUABLE, not because of the insights it provided, but for the EVIDENCE (video and heatmaps) that you could use to persuade the big wigs.
So find a way to start getting yourself into trying out various methodologies, to fix problems. Doing UX when things are "kind of OK" can be quite hard imo, especially at the beginning.
Your background will be so useful, again imo and experience, you will be able to use UX to provide guidance and ideas and then MAKE THE BLOODY THING which lots of UX-ers can't do. I liked the cross-over - I code a bit and sometimes found it easier to make what I wanted, rather than specifying it or creating "designs".
Good luck!
Tom
Bonus items
Don't Make Me Think - Steve Krug Information Architecture - Louis Rosenfeld, Peter Morville
* The Notebook: A History of Thinking on Paper by Roland Allen * The Carrier Bag Theory of Fiction by Ursula K. Le Guin * Too Much To Know: Managing Scholarly Information Before the Modern Age by Ann M. Blair * Communicating with Slip Boxes: An Empirical Account by Niklas Luhmann * Akin's Laws of Spacecraft Design * Writing the Laboratory Notebook by Howard M Kanare * Paper Machines: About Cards & Catalogs by Markus Krajewski * A System for Writing by Bob Doto * Building a Second Brain By Tiago Forte * Index, a History of the by Dennis Duncan * Forgetting Machines: Knowledge Management Evolution in Early Modern Europe by Alberto Cevolini * The Filing Cabinet: A Vertical History of Information by Craig Robertson * How to Take Smart Notes by Sonke Ahrens * Filing and Database Systems by Jeffrey Robert Stewart, Judith A. Scharle, Judith Scharle Greene * Organizing from the Inside Out by Julie Morgenstern * The Library: A Fragile History by Andrew Pettegree, Arthur der Weduwen * The Extended Mind by Annie Murphy Paul * Stolen Focus: Why You Can't Pay Attention by Johann Hari * Papyrus: The Invention of Books in the Ancient World by Irene Vallejo * Filing by Jeffrey Robert Stewart, Judith A. Scharle * How Romantics and Victorians Organized Information by Jillian M. Hess * A Writer's Notebook by W. Somerset Maugham * The Bullet Journal Method by Ryder Carroll * The Medieval Scriptorium by Sara J. Charles * Chance Particulars by Sara Mansfield Taber, Maud Taber-Thomas * The Great Mental Models Volume 1- General Thinking Concepts by Parrish, Shane; Beaubien, Rhiannon * The Product is Docs by Christopher Gales * Antinet Zettelkasten by Scott P. Scheper Articulating design decisions by Tom Greever The Card System at the Office by J Kaiser * Systematic Indexing by J Kaiser * Commonplace Books and the Teaching of Style by Lynee Lewis Gaillet * Magic and hypersystems : constructing the information-sharing library by Harold Billings. * The Magical Number Seven, Plus or Minus Two: Some Limits on our Capacity for Processing Information by George A. Miller * The Commonplace Book by Elizabeth Smither * The Oxford Handbook of Expertise * Trees, maps, and theorems: Effective communication for rational minds by Jean-luc Doumont * Applied Secretarial Practice by Rupert P. Sorelle and John Robert Gregg * The Card Catalog by Carla Hayden * What is a Document by Michael Buckland * The Commonplace Book by Ann Blair * Make Better Documents by Anil Dash * A Core Calculus for Documents by Will Crichton and Shriram Krishnamurthi * The Craft of Research by Wayne C. Booth, Gregory G. Colomb, Joseph M. Williams * Information by Anthony Grafton * The Card Catalog by Carla Hayden * Files: Law and Media Technology by Cornelia Vismann * Living Documentation: Continuous Knowledge by Cyrille Martraire * Living in Information by Jorge Arango * How to Write a Technical Paper: Structure and Style of the Epitome of your Research† by Georgios Varsamopoulos * Information Development: Managing Your Documentation Projects, Portfolio, and People by JoAnn T. Hackos * Information Architecture: For the Web and Beyond by Louis Rosenfeld, Peter Morville, Jorge Arango * Software Technical Writing: A Guidebook by James (jamesg.blog)