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We Had Flags
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20 October 2026

A gritty post-apocalyptic survival thriller with a mysterious foreign ship, rising prejudice, political intrigue, and humanity’s last city on the edge of collapse.
A law only works if people obey it.
For forty years, New City has survived by enforcing one unbreakable rule: no one is allowed to Blame any group for the fall of civilization. Anyone who does is branded and stripped of everything.
It is the law that keeps the peace.
Until a foreign ship appears on the horizon.
When strangers arrive from across the sea, fear spreads fast. Old prejudices resurface. And for the first time in decades, people begin to break the one law holding their world together.
As tension rises and violence threatens to erupt, Sheriff Annette Cruz is forced to hold the line between order and chaos. But when Blame takes hold, it doesn’t stay contained.
And once it starts… it’s impossible to control.
Because the fastest way to destroy a city isn’t from the outside. It’s from within.
We Had Flags is Book 3 in the Toxic World series, perfect for readers of Cormac McCarthy, and Hugh Howey who enjoy dark post-apocalyptic fiction, political tension, and survival in a fractured world.
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Praise for the Toxic World Series:
★ ★ ★ ★ ★ Complex characters, exciting plot twists, and action-packed adventure
★ ★ ★ ★ ★ Great, all-too-human characters and nearly perfect pacing
★ ★ ★ ★ ★ A well-developed post-apocalyptic world with expanding story threads
★ ★ ★ ★ ★ A gripping story that kept me reading late into the night
★ ★ ★ ★ ★ A strong instalment with rich character development and new layers to the story
Sean is busy working on two fiction series: The Masked Man of Cairo (neo-pulp detective adventure) and The Berlin Murders (historical mystery).
Half of Sean's time is spent on the road researching and writing. He's traveled to more than 30 countries, interviewing nomads in Somaliland, climbing to clifftop monasteries in Ethiopia, studying Crusader castles in Syria, and exploring caves in his favorite state of Missouri.
Sean is always happy to hear from his readers, so drop him a line via his website seanmclachlan.net!