Are There “Lost Books” of the Bible?

One of the smallest books of the Bible is the epistle of Jude, the brother of James. Although it is short, it contains an unusual element: a reference to a story from the pseudepigrapha, Jewish non-canonical writings. Just as there were Christian writings that were never accepted as Scripture, apocrypha, the Jews also had books which were popular but were never accepted as Scripture. Some people call them the "other" writings or the "lost books" of the Bible.