Definitions for "Gospel Book"
The book (usually with an ornamented cover) which contains the Gospel lessons appointed for use at the Eucharist. It is carried in procession (at the entrance) and at the proclamation of the Gospel by the deacon or other reader. "It is desirable that the lessons and Gospel be read from a book or books of appropriate size and dignity" (BCP, 406).
The Gospel Book, or Book of the Gospels is a codex or bound volume containing one or more of the four Gospels of the Christian New Testament.
British Library, Add. MS 40618 is a late 8th century illuminated Irish Gospel Book with 10th century Anglo-Saxon additions. The manuscript contains a portion of the Gospel of Matthew, the majority of the Gospel of Mark and the entirety of the Gospels of Luke and John.