No.. Moses wrote the book of Genesis
God promised it to Abraham (Genesis ch.15 and elsewhere), and instructed Joshua to conquer it (Joshua ch.1), which he did.
The Yahwist wrote the first half of Exodus, as well as around half the material in Genesis and a small amount of material in Numbers. The Yahwist seems to have known nothing of the man Joshua.
Joshua wall
God promised it to Abraham (Genesis ch.15 and elsewhere), and instructed Joshua to conquer it (Joshua ch.1), which he did.
joshua - 约书亚 (Yuē shū yà)
"Josué" (rare, even more than "Joshua")
Canaan (Israel) is the land that God promised to Abraham (Genesis ch.17), to Isaac (Genesis ch.26), to Jacob (Genesis ch.28), and to Jacob's descendants the Israelites (Exodus ch.6). The promise was fulfilled when Joshua led the Israelites into Canaan (Joshua ch.3-4) and they inherited it.
They are recorded in the Bible. See Genesis and Exodus and Joshua and the Gospel books.
Genesis exodus, Leviticus, Numbers, Deuteronomy Joshua, Judges, Ruth,
Christophanies, or appearances of Christ, are seen in the Old Testament in instances such as the visitation to Abraham in Genesis 18, the encounter with Jacob at Peniel in Genesis 32, and the appearance to Joshua before the battle of Jericho in Joshua 5.
Genesis Exodus Leviticus Numbers Deuteronomy Joshua Judges
Genesis, Exodus, Leviticus, Numbers Deuteronomy, Joshua, Judges