Conspiracy / Colleen Coble.

Enhanced descriptions from Syndetics:

Conspiracy, the third book in USA TODAY bestselling author Colleen Coble's Sanctuary series (following Ambush and Prowl), delivers exactly what her fans want: the ideal blend of suspense that keeps you on the edge of your seat with just the right amount of romance. Perfect for fans of Laura Dave, Allison Brennan, and Lynette Eason.

Fifteen years of secrets. One chance for justice.

Just as wildlife veterinarian Paradise Alden begins to envision a future with Blake Lawson, the ghosts of her past return with a vengeance. The murder of her parents has shadowed her for fifteen years, but a new threat brings the cold case into the terrifying present. A trained leopard--a chilling embodiment of Paradise's deepest fears--is now stalking her.

Haunted by resurfacing memories, Paradise, Blake, and her newfound brother, Drew, follow a trail of clues that leads them into a web of dark family secrets. The deeper they dig, the more shocking the connections become, linking their families to a dangerous conspiracy that someone is still willing to kill to protect.

With every step closer to the truth, the killer becomes more desperate. Paradise, Blake, and Drew must race to expose a murderer who has remained hidden for fifteen years, but this time, they are the ones being stalked. If they can't unmask the killer, the past will destroy both the fragile future Paradise and Blake are trying to build and the family she has finally found with her brother.

A conspiracy of lemurs is a family. But a conspiracy of people can be deadly.

Colleen Coble's Conspiracy combines gripping suspense with slow-burn romance and includes intriguing mysteries from both the past and present, sabotage and danger, second-chance romance, found family, and themes of overcoming pain and how the past doesn't have to define you.