Blacke, O. (2026). The Key to a Killer: A Ruby and Cordelia Mystery. Minotaur Books.
Cita Chicago Style (17a ed.)Blacke, Olivia. The Key to a Killer: A Ruby and Cordelia Mystery. Minotaur Books, 2026.
Cita MLA (8a ed.)Blacke, Olivia. The Key to a Killer: A Ruby and Cordelia Mystery. Minotaur Books, 2026.
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