These are the Apocrypha (meaning "hidden") of the Old Testament, 12 "books" written or preserved in Greek, dating from the 300 B.C. to 100 A.D., and included as part of the Greek Version (Septuagint) of the OT. These writings are often called "deutero-canonical", meaning that historically the Church has in part recognized them as authoritative and inspired. Many Church Fathers treat and quote the Apocrypha as though it were Scripture; and it was regularly used in teaching, private reading and the liturgy. The Jewish canon of the Old Testament does not recognize these books, nor has the Protestant Reformation, while the Roman Catholic and Eastern Orthodox churches still consider them part of Scripture.
The Wisdom of Solomon and Sirach (two examples of Wisdom Literature - one mystical, the other practical)
Baruch (attributed to Jeremiah's scribe)
1 and 2 Esdras
1 and 2 Maccabees (history of the Maccabean age)
The "additions" to Daniel and Esther
NOTE: The Apocrypha is now included as part of the KJV in the Version 5 and OneTouch Libraries.