from the wooden library at Alnarp, Sweden ~ there are 217 volumes in the set. This specific xylothek was made in Nurmburg, Germany from 1805-1810. Each book is made from the wood of a specific tree or shrub and contains specimens pertaining to that variety as well as a written description, biology, and practical use.
How cool is this? The Alnarp Library in Sweden has a 217 volume collection of wooden books called The Tree Library. Each book describes a specific tree—its binding is bark, moss and lichens found on that species and the book interiors hold more natural surprises. The books were made in Germany during the 19th century.