Deadly Texas Summer by Colleen Thompson

Someone murdered her coworker…is she the next target?

When her assistant’s death is ruled a suicide, wildlife biologist Emma Copley knows the authorities got it wrong. The killer is still out there, threatening Emma’s work and her life. Launching her own investigation, Emma turns to Beau Kingston, who’ll do anything to protect her — even resist their growing attraction. But the handsome rancher has secrets of his own, secrets that could cost them everything…