While Renaissance Books carries thousands of well-known used books, there's no shortage of rarities within the store.

A few others on animal skin. When a Bible came off the press, only the black letters were printed. Hand decorations and bindings were added later, depending on each buyer's taste and budget.

According to researchers, the hidden text is an interpretation of the Bible’s Matthew chapter 12, which was first transcribed as a part of the Old Syriac translations around 1,500 years ago.