This novel was written for Muslims. In particular, it was written for Muslims who are curious about Christianity but do not know how to satisfy their curiosity. You may be afraid of asking certain questions because you fear the reprisal of your peers.
Arabic belongs to the Semitic family of languages, which also includes Hebrew, Syriac, Aramaic, and several languages of Ethiopia, such as the Amharic and the Tigrinya. Arabic and Hebrew are the only Semitic languages that are still used today both in their writing and speaking forms.