The Chronicle of Fionn mac Cumhal Books in Order

The Chronicle of Fionn mac Cumhal is a three-book historical-fantasy retelling of stories about the Irish hero Fionn. Written with Adrienne Martine-Barnes, the series follows Fionn from his dangerous childhood toward the leadership role that will make him a central figure in Irish legend. It uses myth, but it gives the old stories room to feel lived in.

Fionn has to grow into his name.

Master of Earth and Water begins with him as an orphan and exile. Raised away from the people who might fear or exploit his heritage, he learns from the druidess Bodhmall and the warrior woman Liath Luachra. His education is not limited to fighting. Fionn meets the Sidhe, faces monsters, serves powerful men, trains as a smith and poet, and slowly begins to understand what destiny is asking of him.

The second book, The Shield Between the Worlds, moves further into the borderland between mortal life and the Otherworld. Fionn has gained the gift of prophecy after eating the Salmon of Wisdom, but knowledge brings obligations. His quests involve a dragon, hostile supernatural forces, a woman of the Sidhe, and the Hazel Shield that stands between the human and faery realms.

That mix is central to the series. Fionn's world includes kings, clan politics, fosterage, feuds, poetry, and warfare, but the Sidhe are never far away. A promise made to the Otherworld can matter as much as an oath made in a hall. The books treat Irish myth as a living social world, where family ties and personal honor can be as powerful as magic.

Heroism has a long memory.

Sword of Fire and Shadow finds Fionn older and leading the fianna while serving High King Cormac. He is still trying to keep feuds from tearing Eriu apart, but a painful personal betrayal and conflict among the Sidhe test the values he has built his life around. The ending is shaped by the costs of leadership, love, loyalty, and vengeance.

The tone is adventurous and reflective rather than grim. Readers can expect training, travel, combat, romance, supernatural encounters, and a strong sense of place, all grounded in Irish heroic tradition. Start with Master of Earth and Water. Each book advances Fionn's life and responsibilities, so publication order is also the best way to follow his growth from vulnerable boy to legend.