How to Create a knock-down bookshelf with mortise and tenon

Anything that contains the words, "knock" and "down" would sound like something that is unsafe and shouldn't be used. But in this case, knock-down refers to something that is easy to put together, but looks like it took days to complete. So check this tutorial out on how to make a knock-down bookshelf with a mortise and tenon joinery. Good luck and enjoy!