C
Caroline Lennon
Sister Fidelma
Sister Fidelma, an Irish nun and scholar, solves mysteries in 7th-century Ireland. This historical crime series blends medieval history with intricate puzzles, offering a look into early Celtic society and law. Readers will enjoy the blend of historical detail and clever detection.

Absolution by Murder
Sister Fidelma #1
Suffer Little Children
Sister Fidelma #3
The Subtle Serpent
Sister Fidelma #4
The Monk Who Vanished
Sister Fidelma #7
Master of Souls
Sister Fidelma #16
Behold a Pale Horse
Sister Fidelma #22
The Devil's Seal
Sister Fidelma #25
Night of the Lightbringer
Sister Fidelma #28
Blood in Eden
Sister Fidelma #30
Death of a Heretic
Sister Fidelma #33The Sister Fidelma series is best read in publication order to follow the character development and overarching narrative. While each book presents a self-contained mystery, there are subtle continuities in Fidelma's personal journey and the political landscape of 7th-century Ireland.
Each novel in the Sister Fidelma series features a complete mystery that can be enjoyed independently. However, reading them in order allows for a deeper appreciation of the historical context and the evolving relationships between the recurring characters.
Peter Tremayne, the author, has focused primarily on the Sister Fidelma series, and there are no direct spin-off series or prequels featuring these specific characters or this exact historical setting outside of the main series.