ROOK-MERCER - KILL SWITCH

She knew about them. They never knew about her. Now everyone is running out of time.-Eight months after Switzerland, Adrian and Alec Mercer are living quietly on the edge of the world, waiting for a threat that never quite arrives.-Then Roland comes, and everything changes.-Someone has been watching the Croft Estate. Patient, professional, and trained by the same organisation that built half the dangers the brothers have already survived. She is eighteen months older than Adrian. She believes the estate is hers by right. And she has spent nine years - quietly, carefully - building her case.-The brothers had a sister. They never knew. She knew about them.-As the pursuit moves from the Scottish Highlands to the Baltic coast and back again, Adrian and Alec uncover a conspiracy that runs deeper than any basement archive could hold. The organisation that shaped their own lives has been building weapons from broken people for far longer than any of them understood. And the woman hunting them is carrying something she never chose and has only just begun to question - a purpose built into her before she was old enough to resist it.-But she isn't the only secret their father kept. And what they find waiting at the end of a very long, very dark tunnel in Oslo will change everything they thought they understood about their father, his past, and what PULSE was always really building towards.-Kill Switch is a pulse-pounding thriller about family, betrayal, and the lethal cost of everything left unsaid. For fans of slow-burn espionage, morally complex antagonists, and stories where the real weapon was always the truth.-The bloodline was never just two.