The Summer I Turned Pretty Book: 7 Shocking Updates And How The Trilogy’s Ending Might Change In 2025

The Summer I Turned Pretty trilogy, written by the prolific Young Adult (YA) author Jenny Han, has captivated a new generation of readers and viewers thanks to the highly successful Amazon Prime Video series adaptation. As of December 2025, fan excitement is reaching a fever pitch with the impending release of the show’s third and final season, which will adapt the final novel, We'll Always Have Summer. The biggest question remains: Will the show stick to the book’s definitive ending, or will author and showrunner Jenny Han, who has had over a decade to reflect on the story, make a major change?

This article dives into the freshest, most current information surrounding the beloved story of Isabel "Belly" Conklin and the Fisher brothers, Conrad and Jeremiah. From new book speculation to the definitive list of book-to-show differences for Season 3, here is everything you need to know about the book that started it all.

Author Jenny Han: A Complete Biography and The Summer I Turned Pretty Trilogy

Jenny Han is a powerhouse in the world of Young Adult fiction, known for creating emotional, character-driven stories that resonate globally. Her work has been instrumental in the rise of the YA romance genre, and she has successfully transitioned from author to a multi-hyphenate creator in Hollywood.

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• Full Name: Jenny Han
• Born: September 3, 1980
• Nationality: American (Korean-American heritage)
• Occupation: Author, Screenwriter, Executive Producer, Showrunner
• Education: Graduated from the University of North Carolina at Chapel Hill and earned a Master of Fine Arts (MFA) in Creative Writing from The New School in New York City.
• Notable Works: The Summer I Turned Pretty trilogy and the To All the Boys I've Loved Before series (which was also adapted into a successful Netflix movie trilogy).

The Summer I Turned Pretty Book Series in Order

The original story is a complete trilogy, chronicling Belly’s journey from a girl who is "invisible" to the boys to a young woman caught in a complex love triangle. The books are:

1. The Summer I Turned Pretty (Published: 2009)
2. It's Not Summer Without You (Published: 2010)
3. We'll Always Have Summer (Published: 2011)

The Definitive Book Ending: Who Belly Marries

For readers who are new to the series or those simply curious about the original source material, the final book, We'll Always Have Summer, provides a clear and definitive conclusion to Belly's love story. The third novel features a significant time jump and deals with the aftermath of the events in the second book, including Belly and Jeremiah's engagement.

Ultimately, the book ends with Belly marrying Conrad Fisher. Their wedding takes place at Cousins Beach, the iconic setting that has been the backdrop for every pivotal moment in their lives, cementing the idea that Belly and Conrad are "infinite" and meant to be together. This resolution sees Belly choose her first love, the one she has been pining for since childhood, over his younger brother, Jeremiah. The final chapter offers a sense of closure to the emotional journey of the Fisher family, including the legacy of Susannah and the continued bond between Belly's mother, Laurel, and the boys.

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7 Shocking Updates and Book-to-Show Differences for 2025

As the Amazon series prepares for its final season, Jenny Han has made it clear that while the show follows the emotional beats of the book, she is not afraid to make changes. She has had 14 years since the final book’s publication to reflect on the story, leading to major creative decisions.

1. The Show’s Ending May Not Be the Book’s Ending

The most significant update is the consistent teasing from Jenny Han that the show’s third and final season "might not" end exactly the same way as the book. While the book concludes with a clear Team Conrad victory, the show has made "Team Jeremiah" a much stronger and more compelling narrative, leaving the door open for a potential shift in the final romantic pairing.

2. Speculation of a Fourth Book is Rife in 2025

Despite the trilogy's conclusion, there is current speculation, ongoing in 2025, about Jenny Han releasing a brand new *The Summer I Turned Pretty* book or a story that continues the universe. Han has teased that she is "not done yet" with the universe, fueling rumors of a possible fourth novel or a spin-off focusing on characters like Steven or Taylor, who have had their roles significantly expanded in the series.

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3. The Season 3 Time Jump is Significantly Longer

The third book, We'll Always Have Summer, features a time jump. The show's third season is expected to feature a "significantly longer time jump" than the previous seasons, aligning more closely with the book's narrative structure to show the characters as young adults navigating college and life after the events of the second summer.

4. Steven and Taylor’s Relationship is a Major New Plotline

In the books, Belly’s brother, Steven, and her best friend, Taylor, have a minor, flirty dynamic. In the show, their relationship has been elevated to a major, ongoing romantic plotline that is entirely new to the series. This development has provided a compelling side story and is expected to be a key element in Season 3.

5. Belly’s First Kiss Was Changed

A minor but notable change is the identity of Belly’s first kiss. In the original novel, Belly’s first kiss is Jeremiah Fisher. The show changed this moment, making her first kiss with Cam Cameron, a character who is also new to the series, shifting a major romantic milestone.

6. The Introduction of Belly’s Dad, John

The show introduced the character of Belly’s father, John, in a more substantial way than the books. This change allowed the series to explore the dynamic between Laurel and John and the family's reaction to Susannah's illness from a new perspective, adding depth to the Conklin family's story that wasn't present in the original trilogy.

7. New 'Mortal Editions' and Deluxe Books are Coming

For dedicated book collectors, new special editions are being released. "Mortal Editions" of the books are expected to ship around early 2026, offering fans a fresh, collectible version of the trilogy. Additionally, a "Deluxe Edition" of the first novel is available, underscoring the enduring popularity and commercial success of the original story.

The enduring appeal of The Summer I Turned Pretty book series lies in its ability to capture the universal themes of first love, heartbreak, and growing up. Whether you are a loyal book purist or a fan of the new show-canon, the story of Belly, Conrad, and Jeremiah at Cousins Beach continues to be one of the most talked-about Young Adult romances of the decade.