It's easy to make a rustic bookshelf with basic tools like a chainsaw. This was a 20 minute project - the result is rustic, but that's just fine with me. The tree section is from a very old tree that was buried for a few thousand years. I counted the rings and estimate the age to be over 1000 years. The diameter of the tree was about 12 feet. I have many more large pieces to work with.