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
and the Christian Old Testament. The Christian New Testament is a collection of writings by early Christians, believed to be mostly Jewish disciples of Christ, written in first-century Koine Greek. Among Christian denominations there is some disagreement about what should be included in the canon, primarily about the Apocrypha, a list of works that are regarded with varying levels of respect.
Attitudes towards the Bible also differ among Christian groups. Roman Catholics, high church Anglicans, Methodists and Eastern Orthodox Christians stress the harmony and importance of the
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