In this particular case, the mystery is no greatly complex affair but it is, in any case, largely subsidiary to Ellis Peters' painting of a finely detailed picture of life in twelfth century England, and more especially here, within a moderately wealthy family household. There are some unexpected twists and developments along the way, though, and there is certainly nothing predictable about the way the story works itself out, although the ending is no particular surprise either.
In some respects, this is one of the best of the Cadfael books. Its opening pages contain some of Ellis Peters' finest writing, with her descriptions of the running to ground of young Liliwin and the reactions of Abbot Radulfus being quite hair-raising in their potency. The tale unfolds at a sure and steady pace thereafter, too, ensuring that it is always difficult to put the book down, right up until the final exciting, and rather tear-jerking, denouement.