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Emergency Transmission
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20 October 2026

A gritty post-apocalyptic survival thriller featuring toxic fallout, fragile alliances, and a race to save humanity’s last city.
The air is turning deadly. And the last city is running out of time.
A toxic leak offshore is spreading fast, poisoning everything in its path. If it isn’t stopped, New City won’t survive. Forced into a fragile alliance, the city must work with the sailors of a foreign freighter they don’t trust, can’t fully understand, and may not be able to stop if things go wrong.
As resources run thin and tensions rise, the mission begins to unravel. The only chance they have left comes from the last people anyone would trust.
This time, survival may come at a cost no one is ready to face.
Emergency Transmission is Book 4 in the Toxic World series, perfect for readers of Hugh Howey, P. D. James, and Cormac McCarthy who enjoy dark post-apocalyptic fiction, moral dilemmas, and survival under impossible pressure.
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Praise for the Toxic World Series:
★ ★ ★ ★ ★ The best of the first four books
★ ★ ★ ★ ★ Kept me reading late into the night
★ ★ ★ ★ ★ A realistic story with relatable characters
★ ★ ★ ★ ★ I couldn’t wait to see what happened next
★ ★ ★ ★ ★ Completely drawn into 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!