Lethal Tide — C.J. Matthew

Lethal Tide, Dolphin Shore Shifters Book 4
The Santa Barbara Channel holds a closely guarded secret…
Dolphin shifter Conley Nash began his second three-year mission armed with a kick-ass agenda and an attitude to match. Since their team leader was killed, the men in SBW field ops have lost their nerve. Determined to restore the hard line, Conley can't wait to show them how it's done, facing down a greedy oil company in Long Beach. Until Conley meets his new partner…and finds his powers of persuasion need work.
First-time shifter Betty Brett can't believe she finally made it into the male-centric field ops team. Since the first female agent was murdered, before Betty goes solo, she'll spend four months teamed with an experienced operative. But did it have to be Conley? No matter how temptingly handsome he is, Betty refuses to take grief from a trigger-happy male and certainly not one whose knuckles drag the ground.
When the oil company resorts to violence protecting its illegal fracking operation, Conley finds himself out-gunned. Either he and Betty compromise, fast, or they'll be dead before they can unravel the perplexing feelings they have for each other.