Obsidio

Six heroes. One devastated planet. One monstrous corporation that needs to answer for everything. Obsidio brings the Illuminae Files full circle in a finale that is as emotionally devastating as it is brilliantly constructed.

Obsidio by Amie Kaufman & Jay Kristoff | Book 3 of the Illuminae Files

Obsidio is the concluding instalment of the Illuminae Files by Amie Kaufman and Jay Kristoff, published by Knopf/Random House in March 2018. A Kirkus Reviews Best Book of the Year and the recipient of starred reviews from both Booklist and Kirkus, it brings together all six central characters from the trilogy for a final reckoning - and it does so with remarkable structural elegance and genuine emotional punch.

When Obsidio opens, Kady, Ezra, Hanna, and Nik are crowded aboard the container ship Mao alongside two thousand refugees, resources dwindling, the jump station behind them destroyed. With nowhere else to go, the only option is to turn back - back to Kerenza IV, the ice colony where it all began, and where BeiTech's forces have been in occupation for the seven months since the initial invasion. What they will find there, nobody knows.

What they find is Asha Grant - Kady's cousin, survivor of the original assault, and now a covert member of Kerenza's battered underground resistance. Kept alive by BeiTech as a nurse, she has been enduring occupation with grim determination and a fury she keeps carefully contained. Then Rhys Lindstrom arrives on the planet - a BeiTech technician, and Asha's ex-boyfriend, the one whose departure left a wound she has never quite let close. They are on opposite sides of the war. Neither of them planned to feel anything. Neither of them entirely succeeds.

What Kaufman and Kristoff achieve in Obsidio that sets it apart from a standard series finale is the sense that everything - every character, every twist, every seemingly minor detail planted across three books - was always leading precisely here. The decision to introduce a new central pair in each instalment pays off magnificently: rather than narrowing the story down to a single heroic duo, Obsidio widens the lens to show six distinct people with six distinct skill sets, all of whom have a role to play in dismantling the corporation that shattered their worlds. The final battle is fought on multiple fronts simultaneously, and the found family that has assembled across the trilogy is given a climax worthy of everything readers have invested in them.

The second-chance romance between Asha and Rhys - enemies by circumstance rather than nature, pulled towards each other despite everything - mirrors the emotional logic of the first two books while feeling distinct enough to carry its own weight. Their dynamic, set against the occupied ruins of the planet that started everything, gives Obsidio a rawness and a sense of consequence that makes the finale land hard.

Booklist, in its starred review, called it an "out-of-this-world finale." Kirkus praised its "timely themes and lasting resonance." For readers who have followed the Illuminae Files from the beginning, it is a deeply satisfying conclusion to one of the most inventive YA science fiction trilogies ever written. Start with Illuminae. You will not stop until this.