The fifth volume of "Al-A'mal al-'Arabiyya al-Kamilah" (Complete Arabic Works) by Amin Al-Rihani carries the title "Tareekh Najd Al-Hadeeth" (Modern History of Najd), in which the author discusses the biography of King Abdulaziz bin Abdulrahman Al Saud and the history of the unification of the Kingdom of Saudi Arabia. This work is considered one of the most prominent writings on the history of the Arabian Peninsula in the early twentieth century, as it combines historical narration with social and political analysis. First edition, 1980 AD, Al-Mu'assasah Al-Arabiyyah lil-Dirasat wa al-Nashr, Beirut. Price: 35 Riyals