This is the first in the Autumn series, I love it, its a totally original Zombies book!
Synopsis from Goodreads:
In less than twenty-four hours a vicious and virulent disease destroys virtually all of the population. Billions are killed. Thousands die every second. There are no symptoms and no warnings. Within moments of infection each victim suffers a violent and agonizing death. Only a handful of survivors remain. By the end of the first day those survivors wish they were dead. Then the disease strikes again, and all hell breaks loose... The classic free underground novel finally bursts into the mainstream. Cold, dark, relentless and uncomfortably plausible. A Night of the Living Dead for the 21st Century. "the perfect zombie story" "nothing written in the genre has grabbed me in the same way as AUTUMN" "an equal to Romero's Night of the Living Dead"