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The Square Root of Summer by Harriet Reuter Hapgood

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These picks are popular with readers who enjoyed this book. Complete a quick Shelf Talk to get recommendations made just for you! Warning: possible spoilers for The Square Root of Summer below.

In The Square Root of Summer, did you enjoy ...

... the time-bending heartache and second chances?

Opposite of Always by Justin A. Reynolds

If Gottie slipping back to moments with Grey and Jason pulled you in, you’ll love how Jack keeps looping back to the party where he first meets Kate in Opposite of Always. Each reset forces him to rework choices—much like Gottie trying to understand her wormhole-like blips—while the emotional core stays rooted in love, grief, and the tiny decisions that change everything.

... the tender, messy coming-of-age through grief?

The Astonishing Color of After by Emily X.R. Pan

If you connected with Gottie learning to live after Grey’s death and finding her way back to Thomas, The Astonishing Color of After follows Leigh to Taiwan after her mother’s suicide, where she believes her mom has become a bird. Like Gottie’s summer of healing, Leigh’s journey—through family secrets, first love, and art—feels like growing up in real time, raw and luminous.

... the intimate dive into grief and memory?

We Are Okay by Nina LaCour

Gottie’s aching nostalgia for Grey and the way the past keeps intruding mirrors Marin’s winter break in We Are Okay, where an old friend arrives and forces her to face what she’s been avoiding. If Gottie’s quiet spirals, physics notes, and garden memories moved you, Marin’s spare, piercing conversations in an empty dorm will land just as deeply.

... the confessional, candid first-person voice?

The Perks of Being a Wallflower by Stephen Chbosky

If being inside Gottie’s head—tracking every thought as she relives summers with Jason and slowly lets Thomas back in—was what you loved, Charlie’s letters in The Perks of Being a Wallflower offer that same confessional immediacy. Like Gottie, Charlie filters everything through a deeply personal lens as he navigates friendship, first love, and the ghosts that shape him.

... the non-linear, reality-splitting romance?

The Love That Split the World by Emily Henry

If Gottie’s summer felt like skipping tracks—blinking from moments with Grey to confrontations with Jason and new sparks with Thomas—Natalie’s world in The Love That Split the World keeps shifting, too. Guided by the enigmatic Grandmother and drawn to Beau, she slips between versions of her town, piecing together a love story across fractured timelines much like Gottie decoding her own.

Unlock your personalized book recommendations! Just take a quick Shelf Talk for The Square Root of Summer by Harriet Reuter Hapgood. It’s only a few questions and takes less than a minute.