The Book of Acts, also known as the Acts of the Apostles, is a book of the New Testament of the Bible. It is a written account of the early Christian church and the spread of the gospel in the years following the resurrection of Jesus. The Book of Acts is traditionally attributed to the apostle Luke, who was a close associate of the apostle Paul.The Book of Acts begins with the ascension of Jesus and the descent of the Holy Spirit at Pentecost. It then goes on to describe the spread of the gospel through the ministry of Jesus' disciples, including the apostle Peter, the apostle Paul, and other early Christian leaders. The Book of Acts also includes accounts of the establishment of the early Christian church, including the selection of Matthias to replace Judas Iscariot as one of the Twelve Apostles, and the spread of the gospel to various parts of the Roman Empire.Key figures in the Book of Acts include the apostles Peter, Paul, and John, as well as other early Christian leaders such as Stephen, Philip, and Barnabas. The Book also mentions various other individuals, such as the Pharisees, the Roman authorities, and various converts to Christianity, who play significant roles in the story. The Book also includes a number of references to God and his actions, as well as expressions of trust and reliance on him.