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Verdict: A long, warm, deeply satisfying roommates-to-lovers slow burn with no third-act breakup and an ending that makes readers cry, held back by typos and a length that could lose a hundred pages without losing anything that matters.
Best for: Readers who want to live inside a slow burn for 500 pages, who value communication over angst, and who can forgive indie editing for a payoff that lands.
Heat level: ★★★★☆ (4/5 — explicit open door, arriving late)
Rating: ★★★★☆ (4.1/5 — a 4.36 Goodreads average across nearly 12,800 ratings, docked for editing and length)
Tropes: Enemies to roommates to lovers, fake dating, slow burn, sunshine and grump, queer awakening, forced proximity, found family, no third-act breakup, neurodivergent heroine, estranged parent.
The Snowball Effect by Haley Cass is the second book in the self-published Those Who Wait series and a spin-off rather than a sequel — a long slow-burn contemporary lesbian romance set in New York, in which a chaotic, sunny woman who has only ever dated men moves in with the guarded roommate who has disliked her for two years, then volunteers to pretend to be her girlfriend.
It holds a 4.36 average across almost 12,800 Goodreads ratings, a 2% did-not-finish rate on StoryGraph, and a Tantor audiobook, with no trade reviews at all. Readers love it with very few reservations — but the reservations they do have are consistent, and worth knowing before you commit to a book this size.
What Is The Snowball Effect About?
The Snowball Effect is a character-driven contemporary romance that runs on proximity and time. The setup has rom-com bones — roommates who clash, a fake relationship staged for a parent — but the book treats them as the start of a long, gradual shift rather than a farce. It is low-angst by design: the tension comes from feelings and family, not from the couple sabotaging each other, which is why it turns up on so many no-third-act-breakup lists.
Regan Gallagher is bright, impulsive and scattered, with ADHD and a dating history made entirely of men. Emma Bordeaux is organised, reserved and bisexual, carrying a difficult relationship with her mother and a long-standing low opinion of Regan. With their mutual friend Sutton away, the two end up sharing an apartment. The book alternates between them, so you get Regan’s slow realisation about herself from the inside and Emma’s walls coming down from the other side.
What Makes This Sapphic Slow Burn Romance Work
- The slow burn: The most praised element by a distance. Readers repeatedly say the build is long but never stalls, and around nine reviewers say the payoff is worth every page.
- Communication: The leads talk to each other. Around six reviewers single out the absence of miscommunication drama, and it is a natural fit for readers who want romance without a third-act breakup.
- The ending: The final stretch, the proposal and the epilogue are where readers say they cried — the emotional peak of the book rather than a coda.
- Regan’s ADHD: Around five reviewers praise the representation, and Regan’s late-blooming queer awakening is handled with humour and warmth.
- The world of the series: Familiar faces from Those Who Wait turn up throughout, and readers enjoy the cameos as much as the new couple.
Book Synopsis
Regan Gallagher has a gift for rushing into things, and moving in with Emma Bordeaux is the latest. Their best friend Sutton is away, the apartment needs a second person, and Regan is sure she can win over the one woman in their circle who has never seemed to like her. Emma is sure of the opposite. She has spent two years finding Regan exhausting, and sharing a kitchen is not going to change that.
Living together turns out to be complicated in ways neither expected. Regan is louder, messier and kinder than Emma gave her credit for. Emma is funnier and far more guarded than Regan realised. And then Emma’s mother — the parent Emma has spent years keeping at a careful distance — arrives, takes one look at the two of them, and decides they are a couple.
Regan, who has never met a problem she could not make bigger, does not correct her. Suddenly the roommates who could barely share a hallway are holding hands in public, inventing a love story and finding that the pretending is the easy part. For Regan, who has only ever dated men, the realisation about what she wants arrives slowly and then all at once. For Emma, the danger is letting someone close enough to matter — and finding out what happens if she does.
My Review
The slow burn is the triumph here, and it is a real one. Cass gives this romance room — hundreds of pages of shared breakfasts, small kindnesses and arguments that slowly stop being arguments — and the payoff feels earned in a way a shorter book could not manage. Readers who loved it say the length disappeared, and I can see why: the relationship moves forward in almost every chapter.
The second strength is the emotional generosity. Regan’s queer awakening is written with humour rather than crisis, her ADHD is part of who she is rather than a plot device, and the couple’s willingness to talk to each other gives the book a calm centre. When the drama comes, it comes from Emma’s family rather than a manufactured breakup, and the ending — proposal, epilogue and all — is where readers say the book made them cry. StoryGraph readers rate the character development strongly at 93%.
Where it struggles is editing, and this is the complaint that recurs most. Around five reviewers flag typos, wrong words and grammar problems; one long-time Cass reader called it the book of hers that finally broke her patience on that front. Around six say the book is simply too long, with repetitive internal monologue — one estimate puts it 250 pages longer than it needs to be. About as many say the opening is slow and Emma hard to like at first, and a handful wish the book spent more time with the couple once they are together. A minority of low-star readers found the ADHD portrayal inaccurate, which directly contradicts the majority.
One expectation to reset: the title and the twinkly winter cover suggest a holiday romance. It is not one — at least one reader points out it is set in summer, and the story spans months. If you came for Christmas, recalibrate; if you came for a long, tender slow burn, it is exactly that.
My honest note: A big-hearted, beautifully paced romance in a book that needed a firmer editor. If typos ruin a story for you, you will notice them. If you can read past them, the payoff is one of the most satisfying in recent sapphic romance.
| Element | In The Snowball Effect |
|---|---|
| Central relationship | Regan Gallagher & Emma Bordeaux — sunny, chaotic roommate and guarded bisexual skeptic, enemies to lovers |
| Core tropes | Roommates, fake dating, slow burn, queer awakening, sunshine and grump, no third-act breakup |
| Setting | New York City, over roughly six months |
| Heat level | 4/5 — explicit open door, arriving late after a long build |
| Series | Those Who Wait book 2 — a spin-off with a new couple; complete HEA with proposal and epilogue |
| Content notes | Explicit sexual content, parental estrangement and abandonment, an anaphylaxis and hospital scene, minor homophobia and biphobia, panic attacks, ableism (crowd-reported on StoryGraph and in reviews) |
How Spicy Is The Snowball Effect?
A 4/5, but a patient one. I could not get a romance.io reading for this title, so the number comes from readers: the scenes are explicit and open door, the Lesbrary reviewer called them some of the steamiest she has read in published sapphic romance, and StoryGraph users who flag sexual content overwhelmingly tag it graphic. What every reviewer also notes is timing — the heat arrives late, after hundreds of pages of slow burn, and then it does not hold back.
The thing worth knowing in advance is that structure: if you want spice early and often, this is not that book. No reviewer I found flags kink content. If you want this level of heat in another long slow burn, Truth and Measure and Written in the Stars sit in the same band.
Who Should Read This Book?
You’ll likely love it if: you want a long slow burn that keeps moving, you prefer couples who communicate, you enjoy a queer awakening told with warmth and humour, and you have already loved Haley Cass’s other books.
You may want to skip it if: typos pull you out of a story, 500 pages feels like a commitment rather than a treat, you want heat early, or you picked it up expecting a Christmas romance.
In short: a tender, generous slow burn with a payoff that lands, in a book that needed one more editing pass.
What Readers Are Actually Saying (October 2026)
There is no viral moment behind this book and no trade coverage — no Publishers Weekly, Kirkus or library review that I could find. What there is is an established author with a loyal readership and a book that delivered for them: a 4.36 average across almost 12,800 Goodreads ratings, 4.26 across more than 3,100 StoryGraph reviews with a 2% did-not-finish rate, and 4.7 from almost 5,000 Amazon ratings. It is in Kindle Unlimited, which keeps new readers arriving, and it appears to have been serialised for subscribers before release. I found no Reddit thread of note, though TikTok has a scattering of reader content. The audiobook, from Tantor, is narrated by Lori Prince and runs just under 19 hours; most listeners praise her, and the Lesbrary audio reviewer gave it five stars, though a minority of StoryGraph listeners found the voices grating.
Prefer audio? Listen to The Snowball Effect on Libro.fm — the audiobook shop that supports independent bookstores.
Why readers love it (according to the discourse): The slow burn, first and most consistently — around nine reviewers say it pays off, and several say 500 pages felt like 300. Then the communication: about six praise a romance with no miscommunication and no third-act breakup. The ending and the epilogue made around six readers cry. Regan’s ADHD and her late-blooming queer awakening draw praise from about five, and the cameos from Those Who Wait delight about as many. StoryGraph’s mood data tags it lighthearted at 81% and funny at 77%, and 91% of readers call the characters lovable.
What readers argue about and complain about: Editing, above everything. Around five reviewers flag typos, word-choice errors and grammar, and one says it was the Cass book that finally exhausted her patience — though another felt the editing had improved on earlier books. Second, length: about six readers say it is bloated, with repetitive internal monologue and stretches that could be cut. Third, the start: roughly six find the opening slow and Emma hard to warm to. Smaller notes: the book wraps up quickly once the couple is together, and a couple of readers miss the angst and yearning of Cass’s earlier work. The genuine split is over Regan’s ADHD — praised by most, called inaccurate by a small group of low-star readers.
The series question everyone should ask first: this is a spin-off with its own couple and a complete happy ending, including a proposal and an epilogue. Readers say it stands alone, though the cameos land better if you have read Those Who Wait. The next book, Midnight Rain, is an alternate-universe retelling of the book-one couple rather than a continuation of Regan and Emma — and it rates higher still.
Frequently Asked Questions
Is The Snowball Effect a Christmas romance?
No. Despite the wintry title and cover, readers report it is set in summer and spans several months. It is a contemporary slow burn rather than a holiday romance.
Do you need to read Those Who Wait first?
No. The Snowball Effect follows a new couple and works as a standalone, though characters from Those Who Wait appear throughout and some readers recommend reading it first for the cameos.
How spicy is The Snowball Effect?
A 4/5. The sex scenes are explicit and open door, but they arrive late, after a long slow burn.
Does The Snowball Effect have a third-act breakup?
No. The couple communicates throughout, and the late conflict comes from family rather than the relationship. It ends with a proposal and an epilogue.
Is there an audiobook?
Yes — narrated by Lori Prince for Tantor, running just under 19 hours. Most listeners praise the narration.
If You Loved The Snowball Effect, Read These Next
Start with Those Who Wait, the book that introduced this world, if you have not already — the same long ache, with Sutton and Charlotte at the centre. For the fake-dating engine at a similar heat, Written in the Stars is the closest match, with a sunshine-and-grump pairing of its own. And if it was the burn itself you loved, Truth and Measure stretches the wait even further, at the same level of heat.
For more like this, browse our list of lesbian romance without a third-act breakup or the full Book Reviews collection.
The Bottom Line
The Snowball Effect is a book whose heart outruns its polish. The slow burn is patient and rewarding, the couple talks to each other like adults, and the ending is one of the most emotionally satisfying in recent sapphic romance. It is also too long, slow to start, and marked by the kind of typos a final proofread would have caught. If you can forgive the editing, the romance is worth every one of its 500 pages. Check The Snowball Effect on Amazon →
The Eikna Overall Ranking
On the Eikna scale, The Snowball Effect ranks as a top-tier indie sapphic slow burn — warm, communicative and genuinely moving, held back by editing and length, and best approached for the build and the ending rather than for tight prose.
The Evidence Scorecard
Overall ★★★★☆ 4.1/5
- ✓ 4.36 average across 12,800 Goodreads ratings
- ✓ 4.26 on StoryGraph, 2% did-not-finish
- ✓ 4.7 from nearly 5,000 Amazon ratings
- ✓ Editing the most repeated complaint
Romance ★★★★☆ 4.4/5
- ✓ Slow burn praised as earned
- ✓ Couple communicates, no third-act breakup
- ✓ Proposal and epilogue land emotionally
- ✓ Little time together once they get there
Characters ★★★★☆ 4.2/5
- ✓ 93% on StoryGraph call development strong
- ✓ Regan’s queer awakening handled warmly
- ✓ Series cameos delight readers
- ✓ Emma hard to like early on
Writing ★★★☆☆ 3.4/5
- ✓ 77% of StoryGraph readers tag it funny
- ✓ Dual POV gives both leads depth
- ✓ Banter and domestic scenes praised
- ✓ Typos and repetition widely flagged
Emotional Impact ★★★★☆ 4.3/5
- ✓ Ending made multiple readers cry
- ✓ Emma’s family gives real stakes
- ✓ ADHD representation praised by most
- ✓ A minority call the ADHD rep inaccurate
Heat Level ★★★★☆ 4/5
- ✓ Explicit, open-door scenes
- ✓ Lesbrary calls them among the steamiest
- ✓ Readers tag sexual content graphic
- ✓ Arrives late after a long build
Ending ★★★★★ 4.5/5
- ✓ HEA with proposal and epilogue
- ✓ No cliffhanger
- ✓ Works as a standalone
- ✓ Wraps up quickly once together
Re-read Value ★★★★☆ 3.8/5
- ✓ Comfort-read warmth throughout
- ✓ Lori Prince audiobook widely praised
- ✓ Midnight Rain pulls readers back
- ✓ 500-plus pages discourage a reread
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