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
joshua - 约书亚 (Yuē shū yà)
"Josué" (rare, even more than "Joshua")
God promised it to Abraham (Genesis ch.15 and elsewhere), and instructed Joshua to conquer it (Joshua ch.1), which he did.
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.
Genesis exodus, Leviticus, Numbers, Deuteronomy Joshua, Judges, Ruth,
They are recorded in the Bible. See Genesis and Exodus and Joshua and the Gospel books.
Genesis Exodus Leviticus Numbers Deuteronomy Joshua Judges
Genesis, Exodus, Leviticus, Numbers Deuteronomy, Joshua, Judges
I never wrote Joshua's Song, you must have me confused with someone else.