The hardest assembly was getting the shelves supported while screwing them together.  I found it worked to support them on pillows on my couch, since I was assembling them alone.  The instructions have no words, just pictures, but it is fairly easy to follow.  I am very happy with the product.  The wood shelves are very pretty, I almost didn't want to put anything on them.  They support quite a bit of weight, too.  Way better than anything I found in the local stores.  Thanks, Wayfair!