There are 3 books in the The Axiom series. The newest book is The Forbidden Stars which came out in 2019.

1
The Wrong Stars

Book cover of The Wrong Stars
The shady crew of the White Raven run freight and salvage at the fringes of our solar system. They discover the wreck of a centuries-old exploration vessel floating light years away from its intended destination and revive its sole occupant, who wakes with news of First Alien Contact. When the…
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2
The Dreaming Stars

Book cover of The Dreaming Stars
Ancient aliens, the Axiom, will kill us all - when they wake up. In deep space, a swarm of nanoparticles threatens the colonies, transforming everything it meets into computronium - including the colonists. The crew of the White Raven investigate, and discover an Axiom facility filled with aliens hibernating while…

3
The Forbidden Stars

Book cover of The Forbidden Stars
Aliens known as the Liars gave humanity access to the stars through twenty-nine wormholes. They didn't mention that other aliens, the ancient, tyrannical - but thankfully sleeping - Axiom occupied all the other systems. When the twenty-ninth fell silent, humanity chalked it up to radical separatists and moved on. But…