Despite its Harry Potter-like title, The Book of the Cave of Treasures is actually a rich seam of Jewish and Christian apocryphal lore, by means of which its 5th century author frames the story of Jesus in a truly cosmic context ­– as the inevitable conclusion of God’s redemptive plan for humanity, set in train since the expulsion of Adam and Eve from Paradise.

Along the way we are treated to a feast of extra-Biblical details: of the life of the Patriarchs; of the Wind-Flood that overthrew Ur of the Chaldees, Abraham’s home; of the mysterious Priest-King Melchizedek; the origin of the Magi; the genealogy of Mary; and Adam’s secret burial at the ‘navel of the world’, the very spot where Christ was later crucified.

Translated from the Syriac by Sir E.A.Wallis Budge, former curator of Egyptian and Assyrian Antiquities at the British Museum, the book is extensively annotated, and contains 21 illustrations.