The Arrangement Books in Order
Part ofKiersten Modglin Books in OrderSee all books in the Arrangement trilogy by Kiersten Modglin in order, with story summaries, series background, and guidance on how to dive into this twisted domestic thriller.
Last updated: June 7, 2026
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Publication Order
3 books
The Arrangement
by Kiersten Modglin
2021
To save their failing marriage, Ainsley Greenburg convinces her husband Peter to try an open relationship with strict rules. When those rules are broken, their risky experiment erupts into violence, blackmail, and a secret that can never surface.
The Amendment
by Kiersten Modglin
2022
In this sequel to The Arrangement, Ainsley and Peter Greenburg are trying to rebuild their shattered marriage when new lies, a hidden enemy, and a dangerous secret from their past threaten their family and everything they have left.
The Atonement
by Kiersten Modglin
2022
The final Arrangement novel finds fixer Ainsley Greenburg trapped in a deadly game with her husband Peter. As paranoia mounts and their dark secrets surface, she must decide what she is willing to lose to survive.
Series background & context
The Arrangement novels follow Ainsley and Peter Greenburg, a seemingly polished couple whose marriage is rotting underneath the surface. On the outside they have the careers, the house, and the family they always wanted. On the inside they are nursing old resentments and private betrayals they have never really faced. When Ainsley decides she will do anything to fix things, the solution she proposes becomes the seed of an even darker problem.
In The Arrangement, Ainsley pitches what she calls a simple plan. Once a week, each spouse will go on a date with someone else. They will follow strict rules, never discuss what happens, and use the excitement to revive their own relationship. At first it feels like an edgy experiment, something they can contain. Very quickly the lines blur, feelings get involved, and a terrible night leaves them bound together by a secret that is far more dangerous than either expected.
The Amendment picks up in the wreckage of that decision. The police have asked hard questions, their lies are unraveling, and the people closest to them are not nearly as in the dark as Ainsley and Peter hoped. Trying to move on means navigating grief, suspicion, and the constant fear that someone will expose what really happened. A figure from the past begins to circle their lives again, threatening not only their freedom but also the fragile trust of the people they love most.
By The Atonement, the game has become a full-blown cat and mouse chase. Ainsley, who has always thought of herself as a fixer, finds herself on the run emotionally and physically, unsure whether her husband is her partner or her predator. The marriage that once felt like a safe harbor becomes the most dangerous place in her life. Trapped between protecting her family and saving herself, she has to decide what she is willing to sacrifice and who, if anyone, deserves a second chance.
Across all three books, the trilogy digs into the darkest corners of a long-term relationship, where love, dependency, and manipulation wrap tightly together. The suburban setting feels familiar, but behind the tidy facade are secret rooms, hidden habits, and neighbors who see more than they say. As the story moves from a risky marriage experiment to cover up, to a high-stakes showdown, each book raises the cost of every decision the couple has made.
Readers who like domestic suspense that leans into moral gray areas will find plenty to chew on here. Ainsley and Peter are not simple heroes or villains, and part of the tension comes from watching how far each will go to protect the life they have built. For the best experience, the trilogy is meant to be read in order, starting with The Arrangement, then The Amendment, and finishing with The Atonement, watching the fallout from one bad idea ripple outward until there is nowhere left to hide.
Edited by
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