The Hawk Pierces - A Danielle Baker and Nigel Hawksworth Series, #2

It's summer in the Willamette Valley, and life is getting back to normal for Danielle Baker and her children. But their peace is shattered when Natalie calls. "I'm at my parents' house, and I need your help. How quickly can you get here?"A man was found murdered at an over-55 party that Natalie's parents, Nonna and Papi, had attended, and Detective Nigel Hawksworth is investigating. Soon police officers are hallucinating, Nonna goes missing, and Natalie is fraying around the edges as the danger hits too close to home. And without warning, Danielle's parents arrive and want to stay with her! Nigel doesn't want her to get involved (again), but Danielle won't let that stop her from protecting the ones she loves.
Her children want answers, but her mom wants to spend every day with her, and she still needs to write her next book so she can afford to eat. So much for a relaxing summer.