Billionaire's Salvation Romance Books in Order
Part ofSummer Cooper Books in OrderSee the Billionaire's Salvation Romance books by Summer Cooper in order, with summaries, series background, and where to start June and Kai's story.
Last updated: July 11, 2026
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Billionaire's Salvation Romance books in publication order
4 books
Billionaire's Promise
by Summer Cooper
2024
June Bennet runs a fertility clinic and wants peace, not complications. Then Kai Li, her brother's best friend and old temptation, crashes back into her life.
Billionaire's Cruelty
by Summer Cooper
2025
June knows better than to trust Kai after all the hurt he left behind. That does not stop old feelings from roaring back when he returns.
Billionaire's Ruin
by Summer Cooper
2025
June thinks she has finally found a quieter, safer future. Then the past shifts again, and the life she was building starts to wobble.
Billionaire's Heartbreak
by Summer Cooper
2026
June and Kai have both tried to move on, but a major project throws them together again. Working side by side means reopening feelings neither of them solved.
Billionaire's Salvation Romance books in chronological order

Billionaire's Promise
by Summer Cooper
2024Billionaire's Salvation Romance, Book 1
Billionaire's Cruelty
by Summer Cooper
2025Billionaire's Salvation Romance, Book 2
Billionaire's Ruin
by Summer Cooper
2025Billionaire's Salvation Romance, Book 3
Billionaire's Heartbreak
by Summer Cooper
2026Billionaire's Salvation Romance, Book 4
Series background & context
Billionaire's Salvation Romance, co-written with Susu Chin, looks like a billionaire series on the surface, but the emotional center is more specific than that. This is really about June Bennet and Kai Li, their history, the damage between them, and whether love can survive after too many bad turns.
June is not written as someone dazzled by money. She runs a fertility clinic and wants peace more than flash. That detail matters because it gives the series a slightly more grounded feel than a pure luxury fantasy. Kai, meanwhile, comes in with the exact kind of history that makes peace difficult. He is her brother's best friend, which means the attraction already comes with built-in complications.
And complications are the point.
The first book starts from old pull and bad timing. The second leans harder into hurt, with June trying not to fall for broken promises again. Later books widen the emotional field by showing what happens when both of them attempt to move on, only to get dragged back into each other's orbit through changing circumstances and shared work.
That makes the series feel more serialized than some billionaire romances. These books are not just giving you a fresh couple every time. They are following the same emotional knot as it tightens, loosens, and changes shape. By the time later entries force June and Kai to work together again, the question is not whether there is chemistry. The question is whether chemistry is enough when trust has already been damaged.
The tone sits somewhere between steamy contemporary romance and relationship drama. There is still wealth, status, and all the heightened feeling you expect from the subgenre, but there is also a more grown-up concern with loyalty, regret, and whether people can actually do better the second time.
If you like billionaire romance with a longer emotional runway, this series should work for you. Start at Billionaire's Promise and expect a story that stays locked on history, heartbreak, and the hard work of trying again.
Edited by
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Lead investor at 3one4 Capital whose startup expertise and love for books helped shaped MRB and its growth.















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