NEW YORK TIMES BESTSELLER • FINALIST FOR THE ITW THRILLER AWARD • Perfect husband. Perfect father. Perfect liar?

"Terrific."-John Grisham
"Superb."-Lee Child
"Breathtaking, heart-pounding."-Louise Penny
"A fast-paced, relentlessly gripping read."-Chris Pavone

Vivian Miller. High-powered CIA analyst, happily married to a man she adores, mother of four beautiful children. Until the moment she makes a shocking discovery that makes her question everything she believes.

She thought she knew her husband inside and out. But now she wonders if it was all a lie. How far will she go to learn the truth? And does she really . . .

. . . NEED TO KNOW?

Film rights sold to Universal Pictures for Charlize Theron • Rights sold in more than 20 markets

"Shaping up to be one of the year's biggest new thrillers."-Entertainment Weekly

"So timely . . . Think of the perfect mix of Homeland and The Americans. . . . Need to Know needs to be read by all who relish spy novels. As entertaining as it is informative and as irresistible as it is impossible to put down."-Providence Journal

"Pulse-pounding."-O: The Oprah Magazine

"Accomplished . . . a nonstop thriller tapping into a hot mix of contemporary digital counterintelligence, old-school spying and ageless family drama."-Shelf Awareness

"An early contender for next year's Gone Girl."-GQ (UK)

"The Russia page-turner that should be on everyone's list."-New York Post