Being a fan of historical fiction, and of course a fan of mysteries (because how can you not be a fan of good mysteries?), I have loved The Gareth and Gwen Medieval Mysteries from the first book. But it has just now occurred to me how closely bound together by the history of their time and place (mid-twelfth-century Wales) all the books in the series are.
Gareth is the captain of Prince Hywel of Gwynedd’s telulu (the group of knights which constitute his personal guard), and Gwen is his wife. This is long before there were private – or even public – investigators to determine who was responsible for murders, and before most of the modern techniques of forensic investigation had been discovered. However, Gwen, who grew up with Hywel and has in consequence been spying for him for a long time, and her husband are dedicated and careful observers and can often pick out minute clues that other people would not notice.
This book carries on with the overarching plot that the series has followed almost since the beginning; the continuing attempts by other people and other kingdoms to destroy King Owain, Hywel’s father, and take over his kingdom. The most persistent of these has been King Owain’s younger brother, Cadwalladr, who has been involved in all sorts of murders, thefts, and other forms of double-dealing for years.
In The Unexpected Ally, King Owain is on his way to exact vengeance on King Madog for the attempt on Hywel’s life (this occurred in an earlier book). He can’t punish Cadwalladr for the death of his oldest son, Rhun, because Cadwalladr has fled the country. Hence Cadwalladr doesn’t appear in this book directly, although his activities have earned him frequent mentions. But King Owain’s plans are interrupted by Abbot Rhys of St. Kentigern’s monastery, an old friend of Gareth and Gwen. He has invited King Owain and King Madog to a peace conference at the monastery. King Owain isn’t much in the mood for peacemaking, and the discovery of the murdered body of another of Prince Hywel’s spies in the water trough next to the cow barn doesn’t help matters.
A complicated plot follows that includes the theft of the body before the two investigators can examine it closely, church thefts and other thefts, mysterious other people, another murder, and some people right there at the monastery who turn out to be not who they claimed to be.
And the person who defuses the situation and prevents the war between the two countries is a complete surprise.