The Book of Acts is the fifth book of the New Testament in the Christian Bible. It deals primarily with the history of the early Christian Church, focusing specifically on the events that took place after Jesus' death and resurrection. The book is believed to have been written by the apostle Luke and serves as a continuation of his Gospel account. The Book of Acts begins with the ascension of Jesus and the descent of the Holy Spirit upon the apostles at Pentecost. The early chapters of Acts describe the growth of the early Christian Church, including the preaching of Peter and the conversion of Saul, who later became the apostle Paul. Throughout the book, Luke describes the spread of Christianity across the Roman Empire, including the establishment of new churches and the persecution of Christians. The book also includes accounts of miracles and the work of the Holy Spirit in the lives of believers. The Book of Acts ends with Paul under house arrest in Rome, still preaching and teaching about Jesus Christ. Overall, the book deals with the growth and spread of Christianity in the early years after Jesus' death and resurrection, as well as the challenges and obstacles faced by the early Church.