Thread Of Revenge - Elizabeth Goddard

Coast guard protector...

Marine biologist Sadie Strand is back in her coastal hometown to prove her best friend was murdered — but searching for evidence almost costs Sadie her life. Abducted, drugged and left for dead on a sinking boat, she's barely rescued in time by Coast Guard Investigative Services special agent Gage Sessions, an old friend. Assigned to protect Sadie and connect three complicated cases, Gage risks his life time and again to make sure the woman he once loved survives. But while the handsome, guarded agent vows to protect her, someone will keep killing to ensure the truth never rises to the surface.

Bound By Duty - Valerie Hansen

Assignment: single mum surveillance.

Her serial killer brother's escaped — and it's single mum Zoe Sullivan who's under suspicion! Sgt. Linc Colson trusts two things: his instincts and his Rottweiler K-9 partner, Star — and certainly not the pretty face he's assigned to monitor. He's done everything to keep her from getting under his skin — now he must stop those who want to put her six feet under.