Fatal Connection by Katie Mettner

He won’t let the past expose her to a killer.

Conquering adversity has made Declan Moss a formidable foe. Now the cybersecurity investigator is locked in a race against time to solve a dangerous data breach at his ex-lover’s startup. With escalating attacks on Brooke Hughes’s life, Declan faces off against an enemy turning an intricate case of corporate intrigue into a deadly game of cat and mouse. To survive, Declan and Brooke must put their past behind them and work together to obliterate the threat — before a three-time killer can complete a terrifying agenda.