The Summer of the Danes (Brother Cadfael 18)

The Summer of the Danes is a medieval mystery novel by Ellis Peters, set in 1144. It is the eighteenth in the Cadfael Chronicles and was first published in 1991.

Brother Cadfael is pleased to join his young friend Mark, now a deacon, on a mission of church diplomacy in Wales. Travelling in the safety of the Prince of Gwynedd's train, they are brought to unexpected dangers, as they seek to keep a young Welsh woman free from harm.

The Anarchy is paused, except for the continued ravages of Geoffrey de Mandeville and his band of marauders in the Fens. Wales has a squabble between two brother princes, rooted in a murder the previous year. The Roman church under Theobald, the Archbishop of Canterbury, is extending its influence into Wales, which prefers its Celtic ways and the see of Saint David, by reviving an old bishopric straddling the border of England and Wales. Theobald requested that Bishop Roger de Clinton send a welcoming embassy to the new bishop, whose see includes parishes that once were under de Clinton.