The Gospel of Saint John is a book in the Bible, and an important work in humanity's Christian faith.
Dr. Jennifer Almieri cited a verse from the Gospel of Saint John in a final message to her daughter, Elizabeth Lense. She referred to a story about the raising of a dead man named Lazarus, indicating that her son, Jonathan Lense, had somehow returned to life. (CoE eBook: Ghost)
In 2381, Captain Will Riker quoted a part of this book when discussing the beliefs of the squales on Droplet with Aili Lavena. (TTN novel: Over a Torrent Sea)