Keep It In The Family by John Marrs

Mia and Finn's dream home renovation takes a sinister turn when they uncover a horrifying message in the attic—evidence of past crimes. As Mia becomes obsessed with the house's dark history, her fixation threatens to tear her family apart. When disturbing truths begin surfacing, she realizes the danger isn't safely buried in the past. From bestselling author John Marrs comes a gripping thriller about secrets hidden within walls and the lengths one woman will go to protect those she loves.