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And up in his hotel suite, he claims me for his own. Over and over again. Constantine’s touch helps take away the pain, and he possesses me like I’ve never known. I fall hard. But beneath his kindness to me, to his family, to his dog, I sense danger. How could I know that to the city of Rome, he’s a brutal enforcer? When I trust the wrong man, I discover just how dangerous Constantine can be. He may call me sweetheart, but the Roman Republic calls him Emperor—and trembles at his feet.","forthcoming":false,"isbn13":"9781662539237","publication_date":"20260407","publisher":"Amazon Publishing","slug":"the-ruler","subtitle":"","title":"The Ruler"},"discovery":{"categories":{"all":[{"bisac_code":"FIC027620","confidence_band":"medium","label":"Mafia Romance","score":0.8131,"source":"bisac_hint_model"},{"bisac_code":"FIC027570","confidence_band":"medium","label":"Enemies to Lovers","score":0.7895,"source":"bisac_hint_model"},{"bisac_code":"FIC027340","confidence_band":"medium","label":"Billionaire Romance","score":0.783,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"FIC027620","confidence_band":"medium","label":"Mafia Romance","score":0.8131,"source":"bisac_hint_model"},{"bisac_code":"FIC027570","confidence_band":"medium","label":"Enemies to Lovers","score":0.7895,"source":"bisac_hint_model"},{"bisac_code":"FIC027340","confidence_band":"medium","label":"Billionaire Romance","score":0.783,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"FIC027020","confidence_band":"high","label":"Contemporary Romance","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC027340","confidence_band":"high","label":"Billionaire Romance","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC027560","confidence_band":"high","label":"Dark Romance","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Mafia Romance","score":0.8131,"slug":"mafia-romance"},{"label":"Enemies to Lovers","score":0.7895,"slug":"enemies-to-lovers"},{"label":"Billionaire Romance","score":0.783,"slug":"billionaire-romance"}],"reader_fit":["Readers who enjoy mafia romance with intense emotional and physical relationships","Good for fans of enemies-to-lovers and billionaire romance tropes"],"related_lists":[],"series":null,"similar_books":[{"authors":["Morgan Bridges"],"book_id":"9781538772140","cover_image_url":"https://img.bookfrontier.com/9781538772140.jpg?v=20260424T163327Z%3A2026-04-24T16%3A33%3A27Z","score":22.2791,"title":"Now You're Mine","url":"https://bookfrontier.com/books/9781538772140"},{"authors":["Morgan Bridges"],"book_id":"9781538772164","cover_image_url":"https://img.bookfrontier.com/9781538772164.jpg?v=20260424T163327Z%3A2026-04-24T16%3A33%3A27Z","score":22.2565,"title":"Once You're Mine","url":"https://bookfrontier.com/books/9781538772164"},{"authors":["S.J. 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