Wildcard

Wildcard is the second and final book in Marie Lu's Warcross duology, picking up immediately after the events of Warcross with Emika Chen reeling from the discoveries she made about Hideo Tanaka in the first novel's closing chapters. Hideo, the brilliant young inventor of the Warcross technology and the man Emika had begun to fall for, has been using his neurolink technology for purposes that go far beyond the global gaming sensation he created. The control system he has built into the lenses worn by hundreds of millions of users around the world is about to give him the kind of unilateral power over human behavior that no individual or government should have.

The novel follows Emika as she joins forces with Zero, the mysterious antagonist of the first book whose actual identity and motives turn out to be more complicated than the simple villain framing initially suggested. The two of them have to figure out how to stop Hideo from completing the rollout of the modified neurolinks while also dealing with the much larger ethical questions about technology, control, and what counts as making the world better when the cost is human autonomy. Lu uses the second book to take the questions her premise raised in the first novel and push them toward their full implications.

Marie Lu writes young adult science fiction with a particular knack for high concept worldbuilding and quick character work. The Warcross technology and the global gaming culture continue to develop in this book, with new locations and new aspects of the wider world that the first novel had not yet explored. Emika remains a strong protagonist, capable and morally serious without being a pure heroine type, and Hideo is given enough depth in this volume that his villainy is genuinely tragic rather than simply cartoonish.

For readers who came to the duology through Warcross, Wildcard delivers the resolution the first book had set up. The action sequences move at the pace YA thriller readers expect, and the moral weight of the central question gives the conclusion real heft. For new readers, start with Warcross and read both books in order.