Infinity Ring (Carrie Ryan) Books in Order

Infinity Ring is one of those series built on a strong kid-adventure promise: history is broken, the future is going wrong, and three young characters have to travel into the past to fix what should never have been damaged. The broader series is multi-author and fast-moving, following Dak, Sera, and Riq as they jump into major historical moments and try to prevent the chain of disasters known as the Great Breaks.

Carrie Ryan's part in that larger project is Divide and Conquer, the second book. It drops the trio into medieval Paris during a Viking siege, which is a good match for Ryan because the setup is immediate and physical. Dak ends up captured and forced to move among the Vikings, while Sera and Riq are stuck defending the city from within. No matter who wins the battle, the kids could still lose the mission, and that tension gives the book its pace.

It gets bad fast.

What makes the series work, especially for younger readers, is that the historical backdrop is not just classroom decoration. The books use real pressure points from the past and then throw the protagonists directly into the mess. The characters have to think, improvise, and trust each other while the clock keeps running. Ryan's installment leans into that nicely. There is strategy, danger, divided loyalties, and the constant feeling that one wrong move could make the timeline even worse.

Because this is a shared series, Infinity Ring has a different shape from Ryan's solo work. The story world is bigger than any one book, and Divide and Conquer is meant to sit in sequence rather than stand fully alone. That is useful to know going in. Readers who start with book one and then move into Ryan's book will get the strongest version of the stakes, the team dynamic, and the larger mission.

So the easiest way to think about Infinity Ring (Carrie Ryan) is as Ryan's turn inside a big time-travel relay. She brings urgency, clean setup, and a knack for putting young characters in impossible situations, while the series as a whole supplies the larger alternate-history puzzle. If you want a middle-grade read with action first, history close behind, and chapters that keep moving, this is the Carrie Ryan stop on that trail.