Zoey Parker builds her people by letting them make a mess first. They don't start with a tragic backstory explained in chapter one; you piece it together from the dumb decisions they keep repeating. The protagonist in 'The Last Good Liar' spends half the book sabotaging her own relationships, and you only understand why when you catch a throwaway line about her childhood, like twenty pages later. It feels less like she’s constructing characters and more like she’s uncovering them as she writes, which sometimes means the middle of a book can feel a bit messy, but the payoff is you believe they could exist off the page.
Her dialogue is where a lot of the development happens, through what they deflect or accidentally admit. The love interest in 'Harbor Lights' never says he’s afraid of commitment, but he’ll crack a joke every time a conversation gets too serious. It’s all subtext. I think that’s why some readers find her work slow—if you’re waiting for a big monologue where someone spells out their damage, you won’t get it. The growth is in the slight changes in how they speak to each other by the end, a hesitation that’s gone, a question finally asked straight. The last line of 'Harbor Lights' is just the main character saying someone’s name, without any title or pet name, and it somehow feels like a massive victory.