Teak and Enameled Metal 'String' Style Shelving, [my dad must have had plans b/c he built this all over our living room. we had one of those cup type chairs also. it was all very mid-century modern up in our house.
Scandi Home: DIY Shelf System for the Study (I think I'd prefer to mount it to the wall vs. the leaning shown, but I do love how it looks like a large floating shelf unit - like the look of the shelves on the plywood backdrop)
23+ Easy DIY Shelving Ideas For Your Home Creative & Out of The Box