The Summer Of The Danes

Description for THE SUMMER OF THE DANES by Ellis Peters:

In April 1144 Brother Cadfael leaves his monastery once more, this time in the company of Heledd, a young woman desperate to escape from an arranged marriage, and the youthful Brother Mark, who is representing the bishop on a mission of church diplomacy. Cadfael does not foresee trouble on their errand, but then the travellers become entangled in the conflict between Owain Gwynedd and h treacherous brother Cadwaladr, who has allied himself with a Danish mercenary fleet in order to vanquish Owain ...

This is #18 in A Brother Cadfael Mystery.