This book examines the Gospel of Luke and the Book of Acts as a complementary work (Luke–Acts). The author emphasizes that the two books cannot be understood separately, as together they present a complete narrative of God's salvific work in history, from the life and ministry of Jesus to the development of the early Church. The author describes how Luke's Gospel presents Jesus as the center of God's plan of salvation, with an emphasis on compassion, universal salvation, and attention to marginalized groups. Meanwhile, Acts is seen as a direct continuation of Jesus' work through the Holy Spirit, who guided the apostles in spreading the Gospel from Jerusalem to the wider world. Furthermore, the book also highlights the theological and historical dimensions of both books, including the role of the Holy Spirit, the development of the early Christian community, and the dynamics of mission and evangelization. The author shows that Luke's entire work depicts a 'salvation history', in which God is continually at work in the lives of people and the Church. Overall, this book is a biblical-theological study that helps readers understand the close relationship between Luke's Gospel and Acts and emphasizes the relevance of their messages for the life of faith and the mission of the Church.