Books Mentioned in the Bible But Is Missing From Today's Text

Does the Qur’an Hold in Validity in Stating that the Torah was Lost or Corrupted?

I have been reading with interest the last few exchanges regarding the reading of Jeremiah 8:8.

JEREMIAH 8:8
“How can you say; ‘We are wise, and the Law of the Lord is with us’? But, behold, the false pen of the scribes has made it into a lie’”

Note: Whenever you see that term ‘Law of the Lord’, the Hebrew word is Torah

To me with all due respect to my Christian brethren, I think what is stated is crystal clear. This will also hope to explain, insha’allah, why Jesus(P) was always so hard on the scribes.

I think for those who don’t believe that the Torah was lost to posterity at one time would do good to read the following, insha’allah.

2 KINGS 22:8
“And Hiil-kiah, the high priest,said unto Shaphan, the scribe, I have found the book of the law in the house of the Lord. And Hil-kiah gave the book to Sha phan, and he read it.”

We read that

The accession of Josiah and his eagerness to restore the worship of Jehovah led to the renovation of the Temple, and in the course of this, B.C. 621, the book of Deuteronomy was discovered. The priest took it to the king, who joyfully welcomed it and set about putting its program of religious reformation into effect. The dramatic story is told in 2 Kings 22 and 23. Josiah put a stop to the idolatrous practices of the people…Edgar J. Goodspeed, How Came the Bible?, pp. 22-23

The Holy Qur’an is not the only Book claiming that some previous scripture was lost. The Bible does, on occasion, mention some books now lost to posterity.

Some examples are:

NUMBERS 21:14
“Wherefore it is said in the BOOK OF THE WARS OF THE LORD, What He did in the Red Sea, and in the brooks of Arnon…”

Has anyone during an archeological dig found this little gem?

JOSHUA10:13
“…Is this not written in the BOOK OF JASHER?”

Does anyone know where this book is?

I KINGS 11:41
“And the rest of the acts of Solomon, and all that he did, and his wisdom, are not written in the BOOK OF THE ACTS OF SOLOMON?”

Could someone let me know where this book is?

1 CHRONICLES 29:29
“Now the acts of David the king, first and last, behold, they are written a BOOK OF SAMUEL THE SEER, and in the BOOK OF NATHAN THE PROPHET, and in the BOOK OF GAD THE SEER…”

Does anyone know where I may find these original books? Where are these above-mentioned books?