Joan O’Leary is the author of the USA Today bestseller, A Killer Wedding. Prior to turning to fiction, O’Leary was a producer at The Tonight Show and studied English and Creative Writing at the University of San Diego. She lives with her husband in New York City.

"This diabolical whodunit had me cackling and turning pages at a breakneck pace late into the night. The twists! The turns! The back-stabbing (and badly behaving) billionaires! I loved every second."  — Colleen Oakley, USA Today bestselling author of Jane and Dan at the End of the World"Intricately plotted and deliciously immersive in its execution, no detail was overlooked in this stunning and impressive debut. I'm already eagerly awaiting Joan O'Leary's next book!" — Elle Cosimano, New York Times bestselling author of the Finlay Donovan mysteries"The Riptons are American royalty—wealthy, powerful, and bound by secrets. When they gather at a grand Irish castle for the society wedding of the year, as the ceremony unfolds something far more sinister lurks beneath the glamour. From the ambitious heirs and spurned lovers to the enigmatic staff and mysterious uninvited guest, everyone harbors secrets—and some are deadly. A gripping whodunit in the vein of Agatha Christie, A Killer Wedding will keep you guessing until the final, shocking twist.” — Liv Constantine, New York Times bestselling author of The Last Mrs. Parrish“Joan O’Leary delivers a dazzling debut with A Killer Wedding, a glamorous, darkly hilarious mystery set amid the cutthroat world of high society. With razor-sharp wit and irresistible style, she unravels a web of secrets, lies, and deadly ambition inside a castle full of suspects. Perfect for fans of twisty whodunits and wickedly entertaining family drama.” — Jean Kwok, New York Times bestselling author of The Leftover Woman“A Killer Wedding is bursting with everything I want in a novel: glamour, secrets, family drama--and a castle in Ireland to boot! Debut novelist Joan O’Leary has crafted a whip-smart whodunit that’s as surprising as it is stylish. With razor-sharp wit and irresistible intrigue, this novel had me guessing (and gasping!) until the very last page. A wildly fun escape from a standout new voice." — Kristy Woodson Harvey, New York Times bestselling author of Beach House Rules“A Killer Wedding is a clever and biting send-up of the lifestyles of the rich and famous, with all their attendant magazine coverage and social media moments. O’Leary adds murder to the mix, raising the stakes with an expertly plotted whodunit and an ensemble cast of suspects.”  — Emily Dunlay, author of Teddy“A fun whodunnit as light as the champagne guzzled by its (many) narrators… A Killer Wedding is a fun romp, making use of its dungeon-like, castle setting complete with secret passageways.” — Crimespree Magazine“[A] crime-solving adventure replete with secret passageways, ulterior motives, and everything else people love from a whodunit… O’Leary tells a gripping story with lively characters readers can root for (or against)… A Killer Wedding delivers on all the premises of a good ‘whodunnit,’ and the family at its center promises some deadly fun.”  — Pittsburgh Post-Gazette“Joan O’Leary’s debut proves that nothing says 'happily ever after' quite like a corpse in the castle. We’re hooked by this glamorous, darkly comic take on toxic wealth, family secrets and high-society scandal.” — Post and Courier“A Killer Wedding is packed with juicy secrets, clever twists, and fabulous characters you definitely do not want to be trapped at a destination wedding with. Darkly glamorous, intricately plotted and so much fun, I loved it.” — Nicci Cloke, author of Her Many Faces“Debut novelist O’Leary breathes new life into the sad oversupply of murder-stricken weddings by the simple expedient of stuffing her entry to the bursting point with subplots and villains…. [R]eads like the wedding-cruise version of Death on the Nile. Not to be missed.” — Kirkus Reviews (starred review)“Former Tonight Show producer O’Leary debuts with an intricate whodunit… O’Leary luxuriates in the gleeful nastiness of her characters and juggles perspectives and timelines like a seasoned pro. With a surprisingly sophisticated plot and a winningly fizzy atmosphere, this is a memorable first outing. — Publishers Weekly“O’Leary’s mystery is a fast-paced, funny whodunit… Murder, riches, and glamour are blended to engaging effect in O’Leary’s first novel. For fans of Jesse Sutanto and Benjamin Stevenson.” — Library Journal“A clever, creative new voice in crime fiction. O’Leary weaves a crafty, clever whodunit that will have you guessing at every twist and turn. She doesn’t just delight in the deviously bad actions of her glitzy characters --- she revels in them, and her tongue-in-cheek approach to their wickedness will have even the most anti-capitalist reader basking in the glow. Although this is her first novel, O’Leary makes masterful use of alternate timelines and perspectives, fleshing out her wedding story with lots of pertinent flashbacks that reveal the dark histories of each of her characters.” — Bookreporter.com“Fans of The White Lotus and Knives Out will gobble up this whip-smart whodunit… Good luck solving this especially twisty mystery before the big reveal—you’ll need it.”   — Marie Claire