This was the second Valencia bookcase I put together. It is of of a suitably durable construction to hold an actual library (that includes the excellent back piece), so expect it to be heavy. It is quite feasible to move it in pieces to its place rather than carrying the box.
This size should have two people to put it together. Considering the heaviness of this series, it is best to buy the smallest size that will suit your needs, or buy two smaller units. Moving it would be a challenge.