There are 3 books in the Sympatico Syndrome series. The newest book is Invasion which came out in 2018.

1
Infection

Book cover of Infection
For fans of Stephen King's The Stand or William Forstchen's One Second After.
 
They weren't ready for the apocalypse but ready or not, it was coming...

Faced with the very real possibility of extinction of the human race, Cole Evans has only one chance to save his family and survive…
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2
Isolation

Book cover of Isolation
Cole Evans thought he'd found a safe haven for his family and a growing band of survivors of the most lethal virus the world has ever known. But he finds continued survival is far from guaranteed as they battle hostile encounters with other survivors, nature, and devastating accidents. Are they…

3
Invasion

Book cover of Invasion
Plunged into a free for all lifestyle with survival of the fittest the only law, it would be easy for Cole Evans and his family to remain in short-term survival mode, living in the moment. But, Cole refuses to lose his conscience—his humanity—and won't stop fighting for a better future.…