Text in Arabic. Join twin siblings, Karim and Hanan, as they explore their world in simplified Arabic. In each book, they learn new phrases and enrich their vocabulary in an entertaining and enlightening way. The series teaches Arabic grammar in five useful books, covering the topics of: 1. Opposites. 2. Adjectives. 3. Singular and plural. 4. Feminine and masculine. 5. Past and present tenses.