The Killer Focus That Almost Killed Me - Dangerous Distractions: The Jack Bardot Mysteries, #1

Three lakefront cottages. Two deadly secrets. And one grad student who can't mind her own business.---Anthropology student Jack Bardot has sequestered herself away in a lakefront cottage to finish her PhD without distractions. But when she realizes she has not one but two sets of vacation neighbors, her semi-professional thirst for people-watching overrules her good sense and she abandons her dissertation to indulge in her favorite activity.
And while the dark-haired woman in the house to the left looks familiar, it's the behavior of the Instagram Influencer couple on the right that gets her attention. At least, at first. As she ramps up her surveillance, things take a worrying turn, and Jack realizes a little too late that her snooping has put her in real danger.