So here's the thing everyone kept telling me about The Sum of All Kisses — that it's the best Smythe-Smith book, that it's peak Julia Quinn wit, that I'd fall in love with Hugh Prentice. And I sat down fully prepared to be charmed but not wrecked.
I was wrong. My heart. MY HEART.
A Mathematician Who Loses Count of His Own Kisses
Hugh Prentice is not your typical Regency hero, and that's exactly why he got under my skin. He's a mathematician — like, genuinely, this man finds comfort in numbers and equations the way I find comfort in color palettes at 2 AM. He walks with a cane from a duel injury that basically blew up two families' lives three years before the story starts. And Sarah Pleinsworth? She HATES him for it. Not in a cute, bantery "oh I secretly find you attractive" way. She's furious because her cousin had to flee society, her family got dragged through scandal, and Hugh just... limps around at parties being quietly brilliant and unbothered.
What Julia Quinn does so well here is let that resentment actually breathe. Sarah doesn't melt the second Hugh says something clever. She's stubborn and dramatic (Hugh literally cannot stand how dramatic she is, and honestly? Fair), and he's prickly and proud about his injury. They get forced together during a week-long family gathering — trapped in drawing rooms and gardens and around dinner tables full of meddling relatives — and the thaw between them is so gradual I almost didn't notice it happening until I was already fully invested.
And then there's the kiss scene where the mathematician loses count. Like, this man who lives by numbers literally cannot keep track because Sarah Pleinsworth has short-circuited his entire brain. I was designing a logo for a yoga studio when that scene hit and I just... sat there. Cursor blinking. Frida judging me from the desk. The vibes are immaculate.
It's the kind of scene Quinn has nailed before — The Other Miss Bridgerton had me pausing my workday in almost exactly the same way.
Rosalyn Landor Turned Dialogue Into a Contact Sport
Okay, I need to talk about Rosalyn Landor because she's doing something sneaky-brilliant with this audiobook. She gives Hugh this measured, careful cadence — almost clipped — that softens so gradually over nine hours that by the end he sounds like a completely different person. And you don't even clock the shift consciously. It just happens the way falling for someone happens.
Sarah gets this bright, slightly breathless energy that Landor leans into during arguments (and there are SO many arguments, bless). The comedic timing on the family scenes is genuinely laugh-out-loud — I snorted during a scene with the younger Smythe-Smith cousins and had to explain to my client on a Zoom call that no, I was not laughing at their brand colors. The dialogue sparkles in a way that feels effortless, but I've listened to enough flat narration to know that kind of timing is actual skill.
I will say — if you're a Julia Whelan devotee like me, Landor's style is different. Less velvet-and-honey, more... sharp silk? She's precise where Whelan is warm. But it works for this book specifically because Hugh and Sarah's dynamic runs on wit, not softness. The precision IS the performance.
Landor pulls off the same trick in The Viscount Who Loved Me — that narrator who lets the banter do all the heavy lifting and never once oversells a joke.
Where the Numbers Don't Add Up
I have to be honest: the last chunk of this book fumbles. There's a villain situation that shows up late, feels rushed, and doesn't carry the emotional weight of everything that came before it. After spending hours on this slow, delicious build between two people learning to see each other clearly, suddenly we're dealing with plot mechanics that feel like Quinn remembered she needed external conflict. It doesn't ruin the book — the foundation Hugh and Sarah built is strong enough to carry it — but it's noticeable. Like a beautiful design with one font choice that makes you go "hmm."
Also, I wanted more from some of the side characters. There's a character named Freddie who felt like she had a whole story simmering just beneath the surface, and we barely scratch it. This is book three of a quartet, so maybe I'm just greedy.
Who Gets to Claim This One
This is a rainy Sunday book. Not a background-while-you-clean book, not a half-listening-on-a-run book. You want to catch the dialogue. You want to hear the shift in Hugh's voice. If you love slow-burn enemies-to-lovers where the "enemies" part is rooted in actual justified anger and not just miscommunication, this is your book. The same grudging-resentment-slowly-becoming-something-else energy runs through An Offer From a Gentleman, another Quinn book that made my spreadsheet for entirely different reasons. If you need constant plot momentum, you might get restless in the middle stretch.
Abuela would have loved this one. She had a thing for stubborn men who didn't know they were in love yet. Hugh Prentice would've made her yell at the screen — or in this case, the speaker.
I ugly-cried exactly once, during a quiet moment near the end where Hugh admits something about his leg that he's never said out loud. Just once. But it was the kind of cry that sits in your chest for an hour after. Added it to the spreadsheet. No regrets.
