A review by morgandhu
Valley of the Shadow by Peter Tremayne

3.0

The sixth of Peter Tremayne’s Sister Fidelma mysteries, The Valley of Shadow, finds Fidelma on her way to the remote western mountains of Cruacha Dubha, the homeland of Laisre, chieftain of Gleann Geis. Laisre and his lands remain pagan, but he has recently sent to King Colgu of Muman, Flidelma’s brother, saying he is willing to enter negotiations to allow a priest to come to his chiefdom, to build a church and a school. Colgu has appointed Fidelma as his emissary, thinking her best suited to speak on behalf of both himself and the church, as a princess of Muman, a religieuse, and a dalaigh. Brother Eadulf accompanies her.

But as they approach the mountains, Fidelma and Eadulf are met with a horrific sight. Thirty-three young men, all monks or priests by their tonsures, ritually killed and left by the road into Gleann Geis. Is it a warning? A threat? Despite the danger, Fidelma is determined to carry out her mission, but now she has another task as well - to find out who is responsible for the murder of her brothers in Christ.

This time, Fidelma finds herself in the midst of not only a negotiation over a request that no one but the chieftain appears to want, but an investigation into a horrific mass murder, and a complex plot against her brother’s throne. A solid mystery, with many twists and turns, it’s also an interesting look at Irish temporal and religious political conflicts in the early years of Christianity in Ireland.