The book seems to be out of print and even second-hand copies are rather expensive at Amazon [Alibris has softcover editions beginning at about $6.00]. If you haunt second-hand bookstores and come across it, it is well worth possessing and reading, and Sayers' notes are as valuable as the plays themselves.
The Man Born to Be King is a series of radio plays, twelve in all, dramatizing the life of Jesus from birth to death and resurrection. First broadcast by the BBC in 1941–1942, they were published in 1943, together with Sayers’s notes for each play and a long Introduction she wrote recounting both her aims and approaches in writing the plays and some of the first (often comical) reactions from the public.
Sayers did not suffer fools gladly, and she takes evident delight in recounting objections, many of which grew out of a kind of piety that resisted the deliberate realism of the plays. Thus, for example, among those who wrote her with objections was one who objected to her having Herod tell his court, “Keep your mouths shut.” The reason for the objection? Such “coarse expressions” struck the correspondent as “jarring on the lips of any one ‘so closely connected with our Lord.’” .... [more]
Gilbert Meilaender on Reading Dorothy Sayers's Play Cycle for Lent - Mere Comments