To build the cubes and shelves together took me about one afternoon.
The hardest part was to assemble the highest two levels which were the longest. They had to be mounted and screwed together with upper and lower boxes.
The final effect of my IKEA cube bookcase impressed all of my family who were at the beginning rather skeptical about my plan and idea.
I’ve leave you with one last idea. When I was planning this IKEA cube bookcase, I thought of using the black LACK shelves as the black dividers. So that may be an option too if you’re thinking of doing something a similar IKEA cube bookcase.