Fast forward to just a few years, when I picked up (and still have close at hand) Hara's Designing Design. It's not a monograph per se, it's more of a collection of Hara's curated works as well as writings by him and his contemporaries. The premise of emptiness and simplicity is a theme throughout the book, and the work it showcases speak not to just design, but more broadly to human sensory experience in general.
Flipping through this beautifully designed object is always refreshing, and the perfect antidote to thoughtless design trend blogs. In conclusion? The collection of work is deeply impressive. I suggest you get your hands on a copy.