I'm currently writing a book that teaches you the standards and principles of UX design. It's all based on how human perception and cognition function and operates. There are a total of 6 standards and 6 principles.
The book doesn't teach you how to design specific UI components but what to keep in mind when creating the user experience. It's filled with UI examples illustrating each standard and principle. Only by studying both will you become a master at UX design.
I like the title. I hope it will not be based around focus on px perfect UI design (as indicated by the "cover art").
Too often I've witnessed devs obsessing over units and fractions: Making sure that 10px in the design is perfectly converted to 0.625 rem or whatever. Whether some UI element has 0.6 or 0.625 rem padding or margins is completely *irrelevant* for the resulting User eXperience, Customer eXperience or similar.
In my ideal scenario, I'd like to see something that may teach devs to shift focus to supporting the goals of the user rather than obsessing over what's ultimately implementation detail.
Please keep me posted!