Aimee-Louise Foster’s fourth novel in the Aces MC series is titled “Locke.” Jake “Locke” Dixon, the main character, wants retribution for his family’s murder. He takes comfort in the ACES MC and plans his vengeance methodically for twenty years. But when he meets Keira O’Flaherty, a fiery and endearing lady who arouses feelings in him, his life takes an unexpected turn. The novel investigates what occurs when Locke’s two worlds merge and Keira is the target of Satan’s wrath.