In this linguistics book, Ignatius Yacoub III explores the relationship between the relative languages Syriac and Arabic. He postulates that the Syriac language is integral to the composition of Arabic language, thus necessary for Arabic students to study. He shows the overlap of the two languages, particularly the extent of Syriac in the Arabic language, by drawing on the most notable exchanges in each letter. In other words, his analysis is an alphabetical exposition of exchangeable words and roots between the two languages.