4 of 66 books.
Paul wrote 8 to 13 books of the New Testament, either himself or he dictated them.
https://amazingbibletimeline.com/blog/q1_bible_who_wrote/
PLEASE use facts, as listed in the Bible timeline. All of the books used in the Bible are Holy Spirit inspired, the real author.
A very famous TV preacher recently stated that Paul wrote over half the NT.
Wow. He could not be more far off. He is also off on other areas. But then, I guess so am I as over the last 50 years God keeps adjusting my thinking in many areas, but NOT in the area of The Lord Jesus and His finished work....other than continually seeing more of the height, depth, breadth and width of what He did in His crucifixion, burial and resurrection....
Actually Luke wrote more of the NT than anyone else, at just under 25%, and Paul wrote just a little less than Luke, both in the 24% range.
Together they did not write half.