Margaret Barker, methodist preacher, lay theologian, and former head of the Society for the Study of The Old Testament, has made it her life's work to illuminate Christianity by trying to understand the context of the events in the Bible. In this work, she turns her attention to the Incarnation.
After dealing summarily with the nature of the Incarnation (neither a conception nor a birth), the first point that Margaret Barker makes is that the Incarnation must be understood in terms of the prophrecies it was fulfilling.
The gospels (she deals mainly with Luke and Matthew) are very selective in their recording of events, omitting many details which are of interest to us today - 2000 years later (a point completely missed by another reviewer on this site). The writers of the gospels recorded those details which were significant to their readers. This largely means, events significant in terms of prophecies. Jesus himself spoke of how he was fulfilling prophecy. Margaret Barker shows all this with reference to the Old Testament which we know, and to other prophecies which were known to people at the time, but are not in the present day Old Testament. These prophecies would have been familiar to the Jewish readers of the gospels, but are opaque to us today.
Turn of the century Palestine was thick with expectation of the coming of the Messiah. Different prophecies in the Old Testament had dated this time. Everyone paid attention to these prophecies, and to astrology. Herod knew that his time was up - he executed a group of priests who were secretly calculating the date of the coming of the Messiah, the King of the Jews.
Margaret Barker also shows how the Jews edited the Old Testament in order to alter texts which were being used as key texts by Christians. It turns out that the Greek text is closer to the original Hebrew than is the modern Masoretic Hebrew. This is proven by the contents of the Qumran texts (the Dead Sea Scrolls).
The second point of the book is how the Incarnation was in some sense a double Incarnation - not a term used in the book, I hasten to add. Mary also fulfills many prophecies relating to almah (the Virgin) in the Old Testament.
Throughout, Margaret Barker places at her disposal a dizzying array of sources, including texts from Qumran, works now forming part of the Apocraphya, the Qu'ran, and contemporary biblical scholarship.
This work does not purport to demystify the Incarnation - the most mysterious event of all times for any Christian - but it does cast a great light upon this great event, and all this in a short and accessible text. I recommend it wholeheartedly.