As books were chosen to represent a New Testament of the Bible, conveying the biography of Jesus and the formation of the Christian Church, a few were chosen and many others passed over. The writings that were chosen by the early church leaders become Bible canon, but there are many gnostic Gospels and falsely ascribed (pseudepigraphal) epistles that still exist today. There is even some disagreement between Catholics, Protestants and Orthodox Christians about what is considered scripture.
Michael Patton, author of the Parchment & Pen Blog published by Creedo House, finds it interesting that while some Gospels with recognizable names, i.e. Gospel of Judas and the Gospel of Mary, were passed over we have four Gospels included in the Bible that are essentially anonymous. Each book is named for the person believed to be the author – namely Matthew, Mark, Luke and John – but none of the writers identify themselves as such. Patton further believes this anonymity adds to rather than detracts from the works credibility.
Please read 4 Gospels or 4 Forgeries and see for yourself. I found the post engaging and his reasoning sound but you’re entitled to agree or disagree.