Heart-stopping action and adventure twists with romance and sex in Jo Leigh's Relentless (4.5). Working in Kosovo as a forensic accountant for the United Nations, Kate Rydell discovers that a CIA-connected group, Omicron, has created a terrible, illegal weapon. When she tries to expose this, she ends up working undercover in America. As a hotel maid, Kate sees a murder and goes on the run again. She can't afford to be involved. But Detective Vince Yarrow needs her help, and when he finds her, he's drawn into the violence Omicron is willing to dole out to make sure their secret never comes out. The excitement is endless, and the attraction between Vince and Kate sizzles.