The Book of the Gospel is a term used to refer to the four books in the New Testament that are attributed to the evangelists Matthew, Mark, Luke, and John. Luke is the fourth book of the Gospel, written by the physician and companion of Paul, Luke. It is the longest of the four Gospels and contains 24 chapters. Luke's Gospel is known for its detailed accounts of Jesus' life and ministry, as well as its emphasis on prayer and the Holy Spirit.