Moses is regarded as the author.
Moses did not write any books that we know of. Rather (to quote Answers.com), " ... the Pentateuch was composed from four main sources: J---the source that uses the Tetragrammaton for the name of God, transcribed YHWH (see http://www.answers.com/topic/ha-shem); E---the source the uses the name EIohim; P---the priestly code (primarily Leviticus); D---the Deuteronomistic source. Some claim to identify a JE source, one combining the first two enumerated above and appearing mainly from Exodus on. The view of different sources for the Pentateuch is also based among other things on the duplication of stories, such as the two accounts of the Creation (Gen. 1:1-2:3 and 2:4-24), or the taking of Sarah by Abimelech as recorded in Genesis 20 (E source) and the taking of Rebekah by Abimelech in Genesis 26 (J source)."
Actually, the first FIVE books of The Bible are called the 'Pentateuch' (meaning '5 rolls'), and though nothing explicitly says who wrote them, there are clues throughout the Bible (Exodus 17:14 / Exodus 24:4 / Exodus 34:27/Numbers 33:2/ Deuteronomy 31:9,19,22,24-26/Joshua 1:7/ Judges 3:4/2Kings 18:6/ Malachi 4:4). Based on these, and many other citations, the writer is commonly believed to have been Moses (Mark 10:3-5/ John 5:46+47 / Mark 12:18+19).
The Book of Haggai is written by the biblical prophet Haggai. He was tasked with encouraging the Jewish people to rebuild the Temple in Jerusalem after their return from exile in Babylon.
The Book of Nahum in the Bible was written by the prophet Nahum. It contains a message of judgment against the Assyrian city of Nineveh for its wickedness and violence. The book also speaks of the Lord's power and protection for his people.
the bible
There is no book called Samson in the bible.
The 65th book in the bible is written by Jude, the brother of Jesus.
Leviticus.
Jeremiah
Genesis, Chapter 3. If you are asking about the third book of the Bible, it is Leviticus.
Nehemiah is traditionally believed to be the author of the Bible book that bears his name, the Book of Nehemiah. It records his efforts to rebuild the walls of Jerusalem after the Babylonian exile.
The third book of the Bible is Leviticus, usually abbreviated Lev.
Moses wrote the first book of the Bible - Genesis - in the wilderness.
The first book of the Bible is Exodus and it was written by Moses. The last book of the Bible is Revelation and it was written by the apostle John.