text: Letters: Paul, James, Peter, John, Jude all wrote 'letters' included in the New Testament. 23 Years reading it in Greek tells me that someone else wrote Hebrews, though it is traditionally attributed to Paul, the internal evidence STRONGLY points to another writer.\n\nStrange... With about 60 semester hours of Bible, I've never run into the "book of the letters" meaning Biblical texts. Origen, and a few other "church fathers" composed multiple letters which have been compiled into 1 or more "book(s) of letters." I would have to know in what context the question is asked to give any real attempt at an answer on that.\n\nYes, John most likely wrote the fourth Gospel which commonly bears his name.