Who would want to kill a nun? That was the problem facing Inspector C.D. Sloan of the Berebury CID when the body of Sister Anne was found at the foot of the cellar steps at the Convent of St Anselm.

Sloan soon found that interviewing half a hundred black-habited sisters as potential suspects for murder was no easy task - especially when he realised that, to him, one nun looked very much like the next, and every sister had an assumed name - and a past …