Lone wolf / Gregg Hurwitz.

"AN ASSASSIN IN FREEFALL. Following a career in which he was always the most dangerous man in the room, ex-government assassin Evan Smoak is the last person his friends should ever have to worry about. But when Evan, formerly codenamed Orphan X, drops out of sight they're concerned. They were right to be. A personal crisis has left him on his knees. A RECLUSIVE BILLIONAIRE. If anyone remembered his first name they never cared to use it. But Allman's lack of empathy hasn't proven any barrier to building a tech empire whose tentacles reach into every aspect of people's lives. And in the rush to praise his genius, no one's asking what it could mean for humanity. Nor what Allman's got coming next. A KILLER AT LARGE. Someone is leaving a trail of dead in their wake. Apparently chosen at random, their deaths dressed up as accidents or suicides. The woman responsible is known only as the Wolf and looks to be every bit Evan's equal. She now has him in her sights. How does it all connect? What is at stake? And will Evan rediscover the instinct and skill he needs to prevail? Or die trying . . ."-- Provided by publisher.