Pressure. Triton Core, #3

Some secrets just won't stay buried.Special Forces operative Liev Stiles' military career ended brutally in an underwater cave. Now recruited to the Ocean Wolves, he survives by burying his traumatic past under vodka and duty. When an earthquake sets in motion an unstoppable chain of events, the Wolves are tasked with a rescue mission to the depths of Lake Baikal, Siberia. But just one look at their head of security's intelligent gaze and Liev knows everything just got a hell of a lot more complicated.
After escaping her violent ex, Eva Petrova swapped careers to ensure no man would ever hurt her again. Now, she's found her purpose-head of security at a top-secret research base hidden in the depths of Lake Baikal. She wants solitude, not distraction in the form of the Russian mercenary with the honed body and steely blue eyes that see right through her. But as the rescue mission is thwarted by further tremors and unraveling secrets that threaten everything, Eva tumbles deeper into Liev's clandestine world.
When it becomes clear that there is something more sinister going on behind the scenes, Liev will risk everything to bring Eva and her team to the surface safely, even though he doesn't know who or what to trust. And as events conspire to kill them, it becomes clear this smart woman just might be the key to his own redemption from a past that won't let him go. Pressure is the third book in the Triton Core series.
Each book is a standalone romance, which follows an overarching story. They can be read in isolation but for maximum enjoyment are best read in sequence.