There are 2 books in the Across Oceans series. The newest book is Where Oceans Hide Their Dead which came out in 2019.

1
The Tourist Trail

Book cover of The Tourist Trail
A literary thriller about endangered species in the world's most remote areas, and those who put their lives on the line to protect them.

Biologist Angela Haynes is accustomed to dark, lonely nights as one of the few humans at a penguin research station in Patagonia. She has grown used…
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2
Where Oceans Hide Their Dead

Book cover of Where Oceans Hide Their Dead

The long-awaited sequel to The Tourist Trail

Robert Porter has quit the FBI in search of his long-lost (and presumed dead) love, Noa, only to find himself on the wind-raked shores of Southern Africa working for a seal-rescue organization. When a confrontation with local sealers ends in murder, Robert must…