No the Bible doesn’t contain all the word of God, only the portion that God wanted preserved. And it was preserved in just the way he wanted. He sent us the Holy Spirit to lead us to all truth.
Gospel means Good News. The Bible is perfectly adequate in giving us all the good news that we need.
1 We are set free from the penalty of sin which is death through the atonement of Christ. </ end gospel>
THAT is Good News. Finding out there are additional works we must perform is not Good News. Finding out that the author of these additional works is a fraud, is definitely NOT good news.
Scriptures mentioned in the bible that are NOT in the bible.
Ex. 24: 7 took the book of the covenant.
Num. 21: 14 book of the wars of the Lord.
Josh. 10: 13 (2 Sam. 1: 18) book of Jasher.
1 Sam. 10: 25 Samuel . . . wrote it in a book.
1 Kgs. 11: 41 book of the acts of Solomon.
1 Chr. 29: 29 book of Samuel the seer.
2 Chr. 9: 29 book of Nathan the prophet.
2 Chr. 12: 15 book of Shemaiah the prophet.
2 Chr. 13: 22 acts of Abijah . . . in the story of the prophet Iddo.
2 Chr. 20: 34 book of Jehu.
2 Chr. 33: 19 written among the sayings of the seers.
Matt. 2: 23 spoken by the prophets, He shall be called a Nazarene.
1 Cor. 5: 9 I wrote unto you in an epistle.
Eph. 3: 3 as I wrote afore in few words.
Col. 4: 16 read the epistle from Laodicea.
Jude 1: 3 when I gave all diligence to write unto you.
Jude 1: 14 Enoch also . . . prophesied of these.
2 Chr. 26: 22 Now the rest of the acts of Uzziah, first and last, did Isaiah the prophet, the son of Amoz, write.
We're Doomed, I tell you, Doomed!!!