Tango Down, eighth in Knopf’s Sam Acquillo Hamptons Mystery Series, was released December, 2017. Back Lash was published in 2016, and received a starred review from Booklist. It followed Cop Job in 2015, about which Booklist said: “…maintains the high standards of previous entries: smooth prose style, brisk dialogue, smart plotline, well-drawn characters, keen sense of place. Another winner from a consistently strong author.“ Knopf’s first novel, The Last Refuge (2005) was a finalist for The Connecticut Book Award. In 2007, Two Time was one of thirteen mysteries listed in Marilyn Stasio’s "Recommended Summer Reading" column in The New York Times Book Review. Head Wounds was cited as one of the best mysteries of the year in 2008 by both Mysterious Reviews and Deadly Pleasures, and the 2008 Benjamin Franklin Award for Best Mystery.

His thriller series featuring off-the-grid sleuth Arthur Cathcart began with Dead Anyway, which received starred reviews from Publishers Weekly, Booklist, Kirkus and Library Journal. It was named one of The Best Crime Novels of 2012 by The Boston Globe and won the 2013 Nero Award. The sequels, Cries of the Lost and A Billion Ways To Die, were released in 2013 and 2014. Three Jackie Swaitkowski Hamptons Mysteries were published by Thomas Dunne/St. Martins – Short Squeeze, Bad Bird and Ice Cap.

Kill Switch, included in Rogue Wave: Best New England Crime Stories, was short-listed for the 2016 Derringer Award. Ugly will be in this year’s Best New England Crime Stories. A Little Cariñoso appeared in the April, 2017 edition of Alfred Hitchcock’s Mystery Magazine. Crossing Harry has been included in Akashic’s New Haven Noir, released August, 2017.

Knopf is also a co-publisher and editor at The Permanent Press.