Rift Runners Books in Order

Rift Runners is Fallon playing with parallel worlds, modern settings, and old magical structures all at once. The series begins with one sharp problem: psychic twins Darragh and Ronan have been separated by betrayal, and if they are not reunited in time, both of them will die.

The twins are what give the trilogy its shape. Darragh comes from a reality where Druids and the Sidhe still matter and magic is part of the way the world works. Ronan, often called Ren, has grown up in our world without understanding who he really is. When the Druid Amergin tears them apart and hurls Ronan through a rift, Fallon turns what could have been a standard portal fantasy into something more unstable and more personal. The danger is not just external. It is built into the brothers themselves.

That setup lets the series jump between realities with very different rules. One world feels close to contemporary life, another keeps older magical bargains alive, and later books open into still stranger versions of Ireland. The result is a trilogy that feels more restless than Fallon's secondary-world fantasies. It has murder accusations, mistaken identity, chases, secret lineages, and the kind of deadline that makes every wrong move worse.

Trása and the other allies matter because they stop the series from becoming only a puzzle about cosmology. Fallon keeps returning to questions of trust, loyalty, and what happens when someone raised in one reality has to survive in another without any shared assumptions. As the books move on, the story broadens from saving one brother to confronting a larger threat to magical races and to the balance between worlds.

This one moves fast.

If you like Fallon because she writes politics, you still get some of that here, but in a different form. Rift Runners is really about identity under pressure. Who are you when your history is wrong, your double exists somewhere else, and reality itself can shift under your feet? The trilogy answers that with adventure, but also with a fair bit of emotional damage.