Robert Ludlum's™ The Bourne Treachery

The world's most ruthlessly efficient assassin, Jason Bourne, has carved a bloody swathe through all his opponents but now he's facing the one force he can't defeat his own past in the latest thrilling entry in Robert Ludlum's New York Times bestselling series.
Three years ago, Jason Bourne embarked on a mission in Estonia with his partner and lover, a fiery Treadstone agent codenamed Nova. Their job was to rescue a Russian double agent, recently been smuggled out of St. Petersburg in the midst of an FSB manhunt.
They failed. Their charge died at the hands of a shadowy assassin.
Now, three years later, everything has changed. Nova is gone, killed in a mass shooting in Las Vegas. Bourne is a lone operative working in the shadows for Treadstone. He's awaiting his next assignment when his handler bring him shocking news.
The Estonian mission was a set up. The double agent is still alive, deep in hiding from the Russian State Intelligence Agency. In order to find her, Bourne will have to come face to face with the errors of his past and the death of the woman he love. And with the body count rising. he comes to an invevitable conclusion-
Some secrets should stay buried.