If you plan on making a book tree, plan on it being time-consuming. And difficult. And taking up a lot of space. And just generally being a magnificent time.
At the latest meeting of The Word Processors, my teen writers group, we finished up our meeting by attempting to create a book tree.
It was a beautiful disaster.
It took us all of 25 minutes. 15 minutes of which was spent quickly pulling our favorite books off the shelves. I hope no one is looking for those ones! They will be under a bunch of snowflakes and blue tinsel until after the holidays :D