Steel (sentinel Security Book 4 - Anna Hackett.... -

Fans frequently highlight the "power couple" dynamic, noting that Killian respects Devyn's capabilities rather than trying to diminish her. Series Reading Order

The protective leader of Sentinel Security who left the CIA to protect his family and friends. Steel (Sentinel Security Book 4 - Anna Hackett....

The story follows , a former CIA operative turned billionaire, and Devyn Hayden , a dedicated loner and one of the CIA's top deep-cover agents. After years of simmering tension and occasional run-ins, the two are forced to collaborate when they discover they are both on the "Top Ten" kill list of a deadly assassin targeting elite global intelligence agents. Fans frequently highlight the "power couple" dynamic, noting

While Steel is written as a standalone, many readers recommend following the series order to better understand the secondary characters and team dynamics: After years of simmering tension and occasional run-ins,

The book features a large ensemble cast from previous installments, including members of the Norcross Security series in a slight crossover.