Regina Upfield

4-Book Bundle: Submission, Authority, Command & SurrenderFour tales of power, devotion, and raw desire. Book 1: Secure SubmissionInvestigator Matt Hale has built his life on structure and discipline. But when a luxury "leadership retreat" on the Hawaiian coast leaves young men changed-or missing-he uncovers a darker truth: not all submission is freely given. To expose it, Mateo volunteers to go inside.
Book 2: Earned AuthorityControl can be taught. Authority must be earned. As complaints about the exclusive Kane Foundation grow impossible to ignore, Mateo goes undercover-risking far more than either man expected. Book 3: Command ReckoningPower. Control. Exposure. When dominance and vulnerability collide in public, every choice becomes a test-of trust, of reputation, and of what survives the light.
Book 4: Structured SurrenderMatt rebuilt his life on order and protection. He does not cross lines. He does not mistake desire for consent. Control is everything. Until it begins to crack.