How to assemble a Grid shelf:
Unpack the box and lay the parts flat.
Start with a Long piece and Short piece. Slide them together gently without forcing them.
Do so with the other shelves.
Flip the assembly over and slide the other long section in. Again there is no need to use force, pushing gently will do the job.
Press on the joints making sure the edges are flush.
Flip over and enjoy!