I've read most of what Parker S. Huntington puts out. Her work is strongly anchored in the new adult and contemporary romance space. You can expect university settings, brooding love interests with money or power, and a lot of emotional push-pull.
That said, I notice a definite progression. Her earlier books, like 'The Forbidden Mate' and the 'Dark Verse' series, have a consistent dark romantic suspense vibe—definitely steamy, with mafia elements and a palpable sense of danger. The stakes feel higher. More recently, she's been leaning into lighter, enemies-to-lovers setups with plenty of banter. The 'Kings of Rittenhouse' books are a good example; they still have the alpha male and intense connection, but the external threats are more about family legacy or social standing than physical violence.
So, core genres are New Adult Romance and Contemporary Romance, with major sub-genres being Dark Romance, Romantic Suspense, and Enemies-to-Lovers. She doesn't really stray into fantasy or historical, it's all very much set in a recognizable, modern world.