Yes, Ellen White's writings state that Moses wrote the books of the law given to him by God, which are known as the Pentateuch.
Here are several statements from her writings on the topic:
* **On the book of Genesis:** "Here, under the inspiration of the Holy Spirit, he wrote the book of Genesis." (
PP 251.1)
* **On writing the laws and statutes:** "After the public rehearsal of the law, Moses completed the work of writing all the laws, the statutes, and the judgments which God had given him, and all the regulations concerning the sacrificial system. The book containing these was placed in charge of the proper officers, and was for safe keeping deposited in the side of the ark." (
PP 466.1)
* **On finishing the book:** "Moses instructed the children of Israel in an earnest, impressive manner. He knew that it was his last opportunity to address them. He then finished writing in a book all the laws, judgments and statutes which God had given him; also, the various regulations respecting sacrificial offerings." (
1SP 334.1)
* **On the purpose of his writing:** "He did not even then trust His precepts to the memory of a people who were prone to forget His requirements, but wrote them upon tables of stone... Moses was commanded to write, as God should bid him, judgments and laws giving minute instruction as to what was required. These directions relating to the duty of the people to God, to one another, and to the stranger were only the principles of the Ten Commandments amplified and given in a specific manner, that none need err." (
PP 364.1)