Job of Edessa was a trilingual polymath whose broad scholarly horizons are emblematic of the exciting and cosmopolitan world of ‘Abbasid Baghdad. Only a few of Job’s many compositions and translations survive, though happily, The Book of Treasures, perhaps Job’s most important work, is still extant. Written around 817 AD, The Book of Treasures is an encyclopedia of philosophy and natural philosophy. It is divided into six sections and each section in turn is divided into a number of subsections. The six main sections deal systematically with a wide variety of topics, including: simple and complex elements, minerals, the five senses, weather, angels, the resurrection and the world to come. Habbi and Daniel made their translation into Arabic deliberately without consulting the English translation of Mingana and only referenced Mingana’s work once they had completed theirs. The result is an independent translation which is more faithful to the Syriac text from which Mingana could at times wander in his English renderings. Habbi and Daniel’s introduction to The Book of Treasures provides a thorough overview of what we know about the life and writings of Job of Edessa and also discusses the sources of The Book of Treasures. A preface by Bishop Gregorios Yohanna Ibrahim provides biographical information on both Habbi and Daniel and offers the Syriac text and a new Arabic translation of a colophon written in Syriac on Mingana’s Syriac manuscript copy of The Book of Treasures by the renowned Patriarch Afram Barsawm. This new translation of The Book of Treasures will be an important resource for all interested in the intellectual world of the Greco-Syriac-Arabic translation movement of the Abbasid period and the history of scientific study and research in Syriac.