Unusual shelving units and bookcases

So I saw this idea and thought it was so creative and so interesting. The tables are sawn in the middle and stacked together and I love the fact that the drawers could be used for extra storage space! I personally would probably go for all the legs being square but this is pretty cool too, to have a variety.

Another simpler example is seen below

Another unusual shelving unit that you can make is toolcrate shelving. You can find all different shape and sizes at garage sales, moving sales or antique stores. Just nail them together and create your own design.

Here is a simpler version of it where all the crates are the same shape and size.