As posted earlier, the book of the law does not state that it is any of the individual books of the Pentateuch (Genesis, Exodus, Leviticus, Deuteronomy and Numbers) because the book of the law is referred to as all these books collectively.
Deuteronomy 31:24-26, [24] And it came to pass,
when Moses had made an end of writing the words of this law in a book, until they were finished, [25], That Moses commanded the Levites, which bore the ark of the covenant of the LORD, saying,[26], Take this book of the law, and put it in the side of the ark of the covenant of the LORD your God, that it may be there for a witness against you.
Joshua 23:6,
Be you therefore very courageous to keep and to do all that is written in the book of the law of Moses, that you turn not aside therefrom to the right hand or to the left
There is too many more scriptures already posted referring to the Torah of Moses (see
post # 1210)