Wicked Darlings by Jordyn Taylor

From the author of The Revenge Game comes a twisty YA thriller about the underbelly of Manhattan's high society, where nothing is off-limits—not even murder.

Aspiring journalist Noa has a secret she's been keeping. Ever since her sister's tragic death, she's felt almost...relieved. Noa and Leah had been locked in competition with one another since childhood, and things came to a head when her sister scored a glitzy internship at a New York society newspaper. Noa can't help but revel in her new found autonomy.

But when she gets a lead about the sketchy circumstances surrounding her sister’s untimely death, she knows she needs to investigate−she owes it to Leah.

Noa sets out to infiltrate the seedy underbelly of Manhattan high society to investigate her sister’s final days. Along the way she finds herself entangled with the glamorous Avalons' and their close-knit circle of friends and frienemies. But will Noa be able to resist the allure of the Avalons' world and uncover a shocking scandal. Or will she find herself in over her head...like Leah?