Steel (sentinel Security Book 4 - Anna Hackett.... Apr 2026

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

, the fourth installment in Anna Hackett's Sentinel Security series , was released on January 26, 2023 . This action-packed romantic suspense centers on Killian "Steel" Hawke, the founder of Sentinel Security, and CIA deep-cover agent Devyn "Hellfire" Hayden. Plot Overview 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 book features a large ensemble cast from

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. Plot Overview Fans frequently highlight the "power couple"

The protective leader of Sentinel Security who left the CIA to protect his family and friends.

While Steel is written as a standalone, many readers recommend following the series order to better understand the secondary characters and team dynamics:

A fierce, independent agent who matches Killian's skills and refuses to be a "damsel in distress".