There are 2 books in the Semiosis series. The newest book is Interference which came out in 2019.

Colonists from Earth wanted the perfect home, but they'll have to survive on the one they found. They don't realize another life form watches...and waits.
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2
Interference

Book cover of Interference

Sue Burke's sweeping, award-finalist, SF Semiosis epic continues in Interference as the colonists and a team from Earth confront a new and more implacable intelligence.

Over two hundred years after the first colonists landed on Pax, a new set of explorers arrives from Earth on what they claim is a…