66 books (39 in the Old Testament, 27 in the New Testament). Note: Catholic and Orthodox Bibles include additional books in the Old Testament, often called the Apocrypha or Deuterocanonical books, totaling 73 or more.

According to Christian theology (based on the New Testament), Jesus is the Son of God and God in the flesh (the Incarnation). This is a central belief of Christianity, often understood through the doctrine of the Trinity.

Theologically, the Bible is considered the inspired Word of God, and therefore infallible (trustworthy) and authoritative for faith and practice. Historically, there is strong manuscript evidence and archeological support for its general historical claims.

Yes, the Gospels mention Jesus having brothers (James, Joseph, Simon, and Judas) and sisters (Mark 6:3, Matthew 13:55-56). Interpretations vary on whether these were biological children of Mary and Joseph, step-siblings, or cousins.