The Liberia Inland Mission developed the Mann Language scripts and other indigenous language scripts to make the ethnic groups in Liberia own the word of God. Thus, the Bible was translated into several local languages in the 1950s. The New Testament version of the Bible has been translated and widely spread compared to the Old Testament. Beyond that, much has not been done to produce other Christian literature in the indigenous languages as in the English language, for example. Therefore, this book, the Book of Joshua, and other books are being translated into the Mann Language to encourage people to read the Bible, especially in the Mann, to rekindle the dreams of the Liberia Inland Missionaries. The Book of Joshua demonstrates God's faithfulness to the children of Israel. God promised them of giving them a land flowing with milk and honey (Exodus 3:8). He promised to remain faithful as long as the children of Israel did not "turn to the right or the left" (Joshua 1:7).

The book further emphasizes God's sovereignty over the earth. For Him to give the promised land to the children of Israel, He severely punished the Canaanites, who had several gods, with massive casualties at the battlefronts. 'There failed not ought of any good thing which the LORD had spoken unto the house of Israel, all came to pass." Joshua 21:45. He is a faithful God.