I don't know much about the bible but I know that it consists of many different authors.
Yes it does.  Many of Jesus's disciples wrote parts of the Bible
Yes, that is true. Many Christians and Jews consider it to be a product of divine inspiration and record of the relationship between God and humans.
And the Bible is the best selling book of all time
Yes, I have heard that before. Most likely because Christians buy it a lot. Also Jews buy it too because the New Testament is a collection of writing by early Jewish disciples of Christ, who wrote it first in Koine Greek.
And the Bible is the most translated book in the world.
Jesus
Jesus (), also referred to as Jesus of Nazareth and Jesus Christ, was a first-century Jewish preacher and religious leader. He is the central figure of Christianity. Most Christians believe he is the incarnation of God the Son and the awaited Messiah (Christ) in the Old Testament.
Virtually all modern scholars of antiquity agree that Jesus existed historically, although the quest for the historical Jesus has produced little agreement on the historical reliability of the Gospels and on how closely the Jesus portrayed in the Bible
Bible
The Bible (from Koine Greek τὰ βιβλία, "tà biblía", "the books") is a collection of sacred texts or scriptures. Varying parts of the Bible are considered to be a product of divine inspiration and a record of the relationship between God and humans by Christians, Jews, Samaritans, and Rastafarians.
What is regarded as canonical text differs depending on traditions and groups; a number of Bible canons have evolved, with overlapping and diverging contents. The Hebrew Bible overlaps with the Greek Septuagint