The book of Malachi.

Counted among the prophets.

Attributed author(s).
Malachi.

Text(s) available.
On site: Malachi 1-4 (Hebrew only).
CCEL: Malachi (Hebrew only).
Swete LXX (Greek only).
Bible Gateway (English only).
HTML Bible: Malachi 1, 2, 3, 4 (Hebrew and English).
HTML Bible: Malachi 1, 2, 3, 4 (Latin Vulgate only).
Zhubert (Greek and English).
Kata Pi BHS: Malachi 1, 2, 3, 4 (Hebrew and English).
Kata Pi LXX: Malachi 1, 2, 3, 4 (Greek and English).
Sacred Texts: Malachi 1, 2, 3, 4 (polyglot).

Useful links.
Malachi at the OT Gateway.
Malachi in the Jewish Encyclopedia.
Malachi at Kata Pi (Oesterly and Robinson).
Malachi from the Plymouth Brethren.

The book of Malachi ranks among the latter prophets in the Jewish scriptures.

The book was originally written in Hebrew, but the ancient Greek translation known as the Septuagint (abbreviated LXX) is also a very important witness to the text. Some versions combine the third and fourth chapters into one.