The dual point of view with the main character switching each chapter is quite common. I see it a lot in the romance that I read through the library app on my phone. And some of them the romance is a side plot. There was one where it was a mystery that started with an artists/younger guy who found a dead body that had on yellow socks in his bathtub but when others went up to see, including another tenant to the old building who is a former navy Seal. Get to see things from both point of view as they try to find out who was dead and who is trying to kill people there, plus why.