Insidious Threats by Melissa F. Miller

Sasha and Leo have triumphed over murderers, terrorists, and corrupt officials. They face their most powerful adversary yet in Insidious Threats. Has the duo finally met their match?

When a troubled tech genius meets a tragic end, he leaves behind an encrypted flash drive and a haunting plea for Leo’s assistance.
Meanwhile, Sasha finds herself drawn into the perplexing disappearance of the managing partner of her former law firm.
As Sasha digs into the truth behind Cinco Prescott’s disappearance, Leo unravels the mystery left behind on the flash drive. What they uncover separately leads to one inescapable conclusion: they’ll have to work together to dismantle the dangerous, dystopian Mjölnir network without being detected … or die trying.