err... the Gospel of Luke was not written by an Apostle, neither was the Gospel of Mark (though arguably Mark was writing down what Peter taught -- as Irenaeus said)
Also, arguably, John of Patmos, the author of Apocalypse may not have been the Apostle John.
Finally, Jude is not known if it was written by the Apostle Jude or the brother of James the Just or if the two were the same.
They were either written by an apostle, or under their supervision and approval.
Either way, those books were quickly recognized as canonical.