If you know me, you know I like books and this past Father’s day I was given a copy of Atlas Obscura – it is fascinating. One entry offers 
a look at a stranger collection of books. These books are housed at Padua University and are made entirely from wood:
What is particularly curious about these 50 or so books is that while most books are made of wood, pulped into paper, these books are both about trees and constructed of them; their construction and contents are truly one and the same. Each volume is about a different species of tree, with its cover made from the wood of that tree, showing both wood radial, longitudinal, and cross profiles. And on each spine is a section of the tree’s bark.