Bach's Calov Bible is an interesting book containing Martin Luther's translation of the bible along with a commentary. What makes this book even more intersting is that it was once belonged to the composer Johann Sebastian Bach.
The work was made in 1681 by the theologian Abraham Calovius who was both the editor and author of the additional commentary. Composed of three volumes, each bearing Bach's signature and the date 1733, the work is currently treasured at the Concordia Seminary Library in St. Louis, Missouri.
Bach's Calov Bible contains marks and annotations, attributed to Bach and confirmed by handwriting analysis and chemical analysis of the ink, thus indicating that the composer made quite a use of it, even correcting some typos resulted from the printing.