The term "gospel book" refers to a manuscript containing the four canonical gospels of Matthew, Mark, Luke, and John. However, there are several other terms used to refer to this book. One common synonym is "book of the gospels," which is used in the Catholic Church's liturgy. Additionally, "harmony of the gospels" refers to a book that combines the four gospels into a unified narrative. The term "evangeliary" is commonly used in Eastern Orthodox and Eastern Catholic Churches. Finally, "canon tables" are lists of cross-references that appear in many gospel books. Regardless of the term used, the gospel book remains as one of the most important and significant books in Christianity.