The Book of Joshua picks up right after Moses dies and shows how God had been faithful to the covenant he made with Abraham by bringing them into the land. It recounts the battles and barriers the Israelites experience in their entering of the Promised Land. God is faithful, and while not all the territory is conquered, the Israelites have safely settled in the land promised to Abraham.
Near the end of the book, Joshua calls on Israel to remember the covenant it made with God. Like with Moses in Deuteronomy, Israel is reminded of the choice it must make – be faithful and obey leading to life and blessing or prove unfaithful leading to all the judgments that befell the Canaanites.