Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Guarded Hearts | 2024 | Em Petrova | Buy |
| 2 | Protected Hearts | 2024 | Em Petrova | Buy |
| 3 | Shielded Hearts | 2025 | Em Petrova | Buy |
| 4 | Rescued Hearts | 2025 | Em Petrova | Buy |
| 5 | Stolen Hearts | 2025 | Em Petrova | Buy |
| 6 | Hunted Hearts | 2025 | Em Petrova | Buy |
| 7 | Relentless Hearts | 2025 | Em Petrova | Buy |
| 8 | Unbreakable Hearts | 2025 | Em Petrova | Buy |
| 9 | Fearless Hearts | 2026 | Em Petrova | Buy |
Black Heart Security is one of Em Petrova’s most recent series, following operatives at a private security firm. Each book pairs a protector with a person in danger, and the titles all follow the “Hearts” naming pattern: Guarded Hearts, Protected Hearts, Shielded Hearts, and so on.
The series launched in 2024 and continues into 2026 with Fearless Hearts. Nine books cover different operatives at the firm, each getting their own case and their own love interest.