This is book 18 of the "Brother Cadfael" series.

This note contains spoilers for the book.

The seventeenth Brother Cadfael novel. Despite the biblical reference, the title refers to the field where a potter had his croft. Before he gave up his craft, abandoned his wife, and entered the monastery. The field then came into the hands of the monastery also, and in their first plowing of it, a dead woman turned up -- probably the potter's wife.

All very complex; traveling peddlers and entertainers, family complexities, people protecting each other, and all. But Cadfael manages to straighten it out eventually, with a little help from god (or at least St. Winifred).