The entire Bible is the work of Prophets ...not some of them
It is not the complete collection of all the writings of the prophets.
It is the complete writings of the prophets of God. The only books not written by prophets are the Apocryphal books .
The Bible is not perfect because man put the words to paper and translated it, and man is not perfect.
Isaiah 40:8 The grass withers and the flowers fall, but the word of our God endures forever."
God is capable of protecting His word...or He is not God at all