This volume of the Cambridge History of Arabic Literature deals with writings on learned subjects from the 'Abbasid period (8th to 13th centuries AD), the golden age of Arabic literature. These cover a wide area, from philosophy, theology and law, through grammar and lexicography, to mathematics, astronomy and medicine. There are separate chapters on six of the greatest scholars of the period, on the development of translations from Greek into Arabic, and on the Arabic literature of the Christians and Jews who lived under the rule of the 'Abbasid caliphate.
It's a good starter book for history of learning. Some of the chapters are really good (Muhsin Mahdi's and the one on Ibn Sina, for instance) while others are nor worth detailed reading. But this is usually the nature of edited volumes.