All The Old Knives, Paperback/Olen Steinhauer

This New York Times bestselling author is deemed by many to be John Le Carre's heir apparent. This is his most intense, thrilling and unsettling novel to date; it centres on Henry and Celia. In the past they both worked for the CIA in Vienna and were lovers, until a rescue attempt on a hijacked plane ended in disaster. Nine years on, both of them still wonder what role the other may have played in the way things unfolded. Now in paperback.