The information on the dust cover claims that this is a previously untold story, while the subtitle suggests that the book is about the discovery of unknown Gospels. In fact the story is not unknown, and the Gospels referred to are what is known as the Sinaitic Syriac, a fourth-century palimpsest containing considerable portions of the canonical Gospels of the New Testament. None the less, this is a well-researched and engagingly-written account of how the Scottish twins Margaret Gibson and Agnes Lewis overcame many obstacles, including those erected by some members of the academic community in Cambridge in the second half of the nineteenth century, to discover (in 1893), decipher and later publish a version of the Gospels that was housed in the monastery of St Catherine on Mount Sinai. The account describes the childhood and upbringing of the twins in the town of Irvine, south-west of Glasgow, and the all-too-brief marriages that propelled them into widowhood. Their father had bestowed financial independence upon them, and this they used to travel to Egypt and Palestine, and to master modern Greek and, later, Arabic and Syriac. Two scholars in particular emerge with credit from the narrative: J. Rendel Harris, who had earlier visited the monastery and who encouraged the twins in many ways, including persuading them to organise an expedition to Sinai and to return there later, and William Robertson Smith, who was a never-failing source of support to the Scottish ladies who, like him, had made their home in Cambridge. Less credit accrues to F. C. Burkitt, who seems to have found it difficult to accept that the twins could be capable of mastering the scholarship necessary to decipher and publish an ancient Syriac work. The book provides a fascinating insight into the hazards of travel to Egypt and Palestine at that time, as well as a vivid account of life at the monastery and how the monks coped with two Scottish women with strong Presbyterian convictions. Later chapters describe the part played by the twins in the discovery of the Cairo Genizah through their association with Solomon Schechter as well as their involvement in the establishment of Westminster College, Cambridge. The book is a worthy tribute to two remarkable women who made a lasting contribution to biblical scholarship.