Zero Days, Ruth Ware

Jack Cross gets paid to break into high tech buildings. She and her hacktivist husband Gabe pinpoint security breaches for companies large and small. It's a point of pride that she rarely gets arrested, when she goes Gabe will bail her out, but Gabe is dead; murdered whilst Jack was out on a job.

In a fog of grief Jack realizes that she is being set up and narrowly evades arrest.

With nothing left to lose she’s determined to punish Gabe’s killer if it’s the last thing she ever does.

Prepare to let your coffee go cold as you read this in one sitting.