Jack Ryan returns in a blockbuster new novel of action, thrills and intrigue in the No.1 bestselling world created by master storyteller Tom Clancy.
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For decades, Taiwan has been a thorn in the side of the Chinese government. New Chinese President Li Jian Jun is done fooling around. He's devised a secret military operation to take the island. Only one man knows how to stop Li's bloody plan for reunification: Minister of Defense Qin Haiyu. Fearing for his life and the safety of his family, Qin covertly makes contact with the CIA in Beijing and signals his desire to defect to the West.

To get Qin out, John Clark creates an international task force reminiscent of Rainbow Six and goes undercover in mainland China. Meanwhile, Lt. Commander Katie Ryan is deployed to the tip of the spear on the destroyer USS Jason Dunham to defend Taiwan. Threatened by an encircling Chinese armada, she's under pressure to find a flaw in the invaders' plan for her father to exploit.

For his part, President Jack Ryan may have the power of the entire US military at his disposal, but what he really needs are Li's secret plans from Defense Minister Qin so he can stave off a war. Because America's Defense Protocol could lead to a game of mutual destruction that could cost the lives of thousands of young soldiers, sailors, special operators . . . and his daughter.
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WHAT REAL READERS SAY ABOUT DEFENSE PROTOCOL

'I could not put this book down. It is an absolute thriller that is 100% worthy to carry on the Tom Clancy name'

'This book is everything you want in a Jack Ryan thriller'

'It was fast paced, the plot kept me intrigued and had all the action that I look for when I go into this world'

'If you enjoy military thrillers or political fiction, you will love this book. This would be a great book for someone new to the Ryanverse'

'Impossible to put down . . . Fast paced, action packed'