A Gospel book is a Christian text that contains the four Gospels of the New Testament: Matthew, Mark, Luke, and John. These writings narrate the life, teachings, death, and resurrection of Jesus Christ. Gospel books are often used in religious services and are considered sacred scripture by many Christian denominations. Historically, Gospel books have been beautifully illustrated and decorated, especially in the medieval period. They serve not only as religious texts but also as important works of art, reflecting the culture and beliefs of the time. Many Gospel books are housed in museums and libraries, showcasing their significance in Christian history.