A MEDIEVAL MYSTERY. On a remote East Anglian coast stands Tyndal Priory, home to a rare monastic order where men and women live and work together in close proximity. Twenty-year-old Eleanor of Wynethorpe has been appointed prioress by Henry III over the elected choice of the priory itself. Young and inexperienced, Eleanor will face a grave struggle - in a place dedicated to love and peace, she will find little of either. SATAN'S LULLABY. Prioress Eleanor knows something is terribly amiss. The situation turns calamitous when Davoir's sick clerk dies from a potion sent by Sister Anne, Tyndal's sub-infirmarian. Is Sister Anne guilty of simple incompetence or murder? Or, Davoir asks, did Prioress Eleanor order the death to frighten him away before he discovered the truth behind accusations she is unfit for her position? When Davoir himself is threatened, the priest roars for justice. Even expectant father Crowner Ralf, the local representative of the king's justice, has lost all objectivity. The most likely suspects are Anne, the woman Ralf once loved, the prioress he respects, and the Tyndal monk, Thomas, who is his closest friend. Who among the French and English assembled at Tyndal has succumbed to Satan's lullaby?