The Cascadia Books in Order
Part ofSarah Lyons Fleming Books in OrderSee all the Cascadia books by Sarah Lyons Fleming in order, with summaries, series background, and where-to-start tips for this West Coast zombie survival saga.
Last updated: June 7, 2026
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Publication Order
4 books
World Departed
by Sarah Lyons Fleming
2020
On the night Rose Winter's troubled marriage and a dreaded anniversary party collide with a sudden zombie outbreak, she, rule bound Tom, and anxious loner Craig are forced to improvise a path to safety across a collapsing Pacific Northwest.
World Between
by Sarah Lyons Fleming
2021
Trapped inside a county fairgrounds Safe Zone ringed by the undead, Rose, Tom, Clara, and Craig juggle fragile relationships, uneasy leaders, and dangerous supply runs while deciding whether staying put or risking escape offers the better chance to stay alive.
World Without
by Sarah Lyons Fleming
2023
After their Safe Zone falls, Rose, Tom, and their found family retreat deep into the mountains, where winter storms, empty forests, and gnawing hunger become as deadly as zombies and force heartbreaking choices to keep the people they love alive.
World Undone
by Sarah Lyons Fleming
2024
With gardens thriving and sturdy fences around Barry's forest cabin, the Cascadia survivors finally have food, friends, and a fragile peace, until distant safe zones go dark and wind driven wildfires threaten to burn away everything they have rebuilt.
Series background & context
The Cascadia series drops you into the same zombie outbreak that powers Sarah Lyons Fleming's other books, but it shifts the camera to the Pacific Northwest. Instead of special forces types, you spend time with regular people who were worrying about marriages, work, and aging parents right up until the virus hits.
At the center is Rose Winter, a middle aged mom whose marriage is falling apart on the eve of a big anniversary party. She wants a tipsy night of karaoke and pretending things are fine; instead, the guests are scattered by sirens, panicked news alerts, and neighbors who suddenly are not quite alive. Rose is practical and nurturing by nature, but the end of the world forces her to take charge in ways she has spent years avoiding.
Tom Jensen, a planner who lives by his personal rules, is just as central. His priority is keeping his daughter, Clara, safe, even if it means abandoning every carefully made plan and settling in a place he never meant to stay. Clara brings a younger perspective, juggling fear, crushes, and the strange task of growing up in a world where high school has been replaced by watch shifts and weapons practice.
Then there is Craig Matthews, Rose's anxious longtime friend who starts the story isolated in another city with more supplies than courage. His goal is simple on paper, reaching Rose in Oregon, but carrying it out means pushing past panic, leaving the safety of his apartment, and walking straight into the chaos he has always dreaded.
As the books move from World Departed through World Between, World Without, and World Undone, the setting keeps evolving. What starts in familiar neighborhoods shifts to a crowded fairgrounds Safe Zone, then to harsher mountain country, and finally to a more permanent cabin and farm tucked into the Oregon woods. Each move solves one problem while creating another, whether it is tyrannical leadership, desperate hunger, or wildfire smoke turning the sky the wrong color.
Throughout, the tension comes as much from people as from zombies. The group has to negotiate with uneasy allies, fend off those who would take what they have built, and decide when to extend compassion and when to shut the gates. There are long stretches of planting, foraging, and cracking dark jokes around a fire, punctuated by sudden, brutal reminders that the dead and the living can both be dangerous.
Underneath the action the series is about community, second chances, and the quiet heroism of doing chores even when the world has ended. Readers who like stories that balance survival detail with deep character work will find a lot to sink into here. The books are tightly connected and best read in order starting with World Departed, especially because they also nod to events and characters from Until the End of the World and The City, while still standing firmly on their own.
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