The seventh book of The Gareth and Gwen Medieval Mysteries series, The Renegade Merchant continues the case from the previous book, The Lost Brother.
It’s the next spring after the events in the previous book. Gareth and Gwen go to Shrewsbury with Gwen’s father, Meilyr, and her brother, Gwalchmai. They want to find out the truth about Adeline, the girl who looks like Gwen who was killed in the previous book, The Lost Brother. Could she actually have also been Meilyr’s daughter? While they are there, John Fletcher, the newly appointed Deputy Sheriff of that town who helped them with the murders of their look-alikes taps Gareth to help him with another investigation.
That case goes through many twists and turns, involving everything from the man to whom Adeline had been engaged to the potential selling of slaves to – surprise – another connection to Cadwallader.
Meanwhile, Hywel and his brothers take Mold Castle. Having found his own clue as to the whereabouts of Cadwallader, Hywel leaves Cynan and Madoc to consolidate the conquest while he too heads for Shrewsbury. He stops off at Dinas Bran, the seat of his aunt’s husband Madog, the King of Powys. Though they are cordially received at first, Madog tries to have them killed. Hywel manages to escape but loses half the men he brought with him.
Hywel arrives in Shrewsbury just in time to help rescue Gareth and Gwen from the slave dealers. These people will apparently sell anybody they can get in their power, although slavery is no longer legal in England. While the slavers have them in custody, they make friends with a new potential ally, a man named Conall who seems to serve one of the Irish kings in a similar capacity as they serve Hywel and King Owain.
Unfortunately, Cadwallader, though he was involved with the slave traders, is once again long gone, and dealing with him still has to be left to the future.