Rob Hart is the author of Assassins Anonymous, The Paradox Hotel, The Warehouse, and the Ash McKenna crime series, and the co-author of Scott Free with James Patterson. He's worked as a book publisher, a reporter, a political communications director, and a commissioner for the city of New York. Hart lives in Jersey City.

"[B]oth books are fun, quick involving adventures where you find yourself rooting for the deadliest people on the planet." --Chicago Tribune

"Terrific . . . This new entry in Hart's solid series is just as good as the first, with thrills, humor, and an ingenious plot. The cast of characters continues to grow, and each is fleshed out enough to lead their own book. Readers should get on the Assassins Anonymous wagon." --Library Journal (starred review)

"If you like them fun, fast, violent, explosive, and gritty, don't miss this one." --CrimeReads

"When I first picked up this book, I thought Rob Hart had said all that needed to be said about a recovering assassin on a journey towards redemption. How wrong I was! The Medusa Protocol contains stories that are worth telling and savoring. It also makes for some of the best thriller writing of the year." --BookReporter

"Hart triumphs with this deliriously enjoyable sequel to Assassins Anonymous . . . He keeps the tone sharp and the intensity high. Fans of Jeff Lindsay and Jeffery Deaver will delight in this series' effortless mix of wit and brutality." --Publishers Weekly (starred review)

"[C]heeky, swiftly paced . . . [T]he stakes are human, the worldbuilding is fun, and the vibrant supporting cast is stocked with spinoff-worthy personalities. Hart brings the heart in this entertaining tale of redemption, sacrifice, and found family." --Kirkus

"This spirited addition to the series is just as rip-roaring and builds on the tremendous cast of characters." --Barnes & Noble, The Best Books of June

"High octane and irresistible, this page-turner is not only breathtakingly smart, but heartbreakingly unique. Completely cinematic, constantly entertaining, and written with Hart's signature dark wit, The Medusa Protocol offers non-stop suspense with the highest of stakes. Do not miss this!" -- Hank Phillippi Ryan, USA Today bestselling author of One Wrong Word

"The Medusa Protocol is an exhilarating, pulse-pounding sequel to Assassins Anonymous that expands the world while standing on its own as a startlingly original thriller. Not to be missed." --S.A. Cosby, New York Times best selling author of All the Sinners Bleed

"The Medusa Protocol is a cracking-whip of a read. From characters and settings to fight scenes, Rob Hart knows how to land a punch--to the gut and to the heart. This follow-up to the kinetically-brilliant Assassins Anonymous buzzes with energy and action." --Rachel Howzell Hall, New York Times and USA Today bestselling author of The Last One

"Hart strikes an incredible balance between nonstop action and unforgettable characters to examine the nature of violence and repentance. The Medusa Protocol is thrilling, funny, and heartfelt--clear your calendar before you start because it's impossible to put down." --Mark Greaney, New York Times bestselling author of the Gray Man series

Publisher: G.P. Putnam's Sons

Pub date: 2026-05-26

Length: 320 pages