WARNING: Contains spoilers for The Summer I Turned Pretty season 2 and the books.

With The Summer I Turned Pretty having been renewed for season 3, some fans of the show may want to begin looking into book 3 of Jenny Han’s series in-depth as it’s likely that the show’s writers will be adapting many of its storylines from that. The Amazon Prime series follows Belly Conklin’s (Lola Tung) summers at Cousin’s Beach and her love triangle with brothers Conrad (Christopher Briney) and Jeremiah Fisher (Gavin Casalegno). The series has stayed true to Han’s book series but also has made some appropriate changes to keep the show fresh and relevant, surprising some fans of the novels.

The Summer I Turned Pretty season 2 was mostly aligned with the events and plots of the second book. Like the book, The Summer I Turned Pretty season 2’s ending showed Belly and Jeremiah finally getting together. However, that doesn’t mean the relationship is going to have an easy ride going forward. Not only does book 3 have several shocking twists and turns, but it may also change the way some fans feel about certain characters and relationships. It’ll be interesting to see how the show will adapt these particular storylines going forward and how closely the show will align with book three.

10. The Summer I Turned Pretty Book 3 Has A 2-Year Time Jump

The gap works well with the book series

The 2023 WGA and SAG strikes interrupted production for a lot of shows and movies as union members fought for fair wages and the use of AI. That means that The Summer I Turned Pretty also experienced a delay in production, even if any scripts for the season were already written. Luckily, this works well with the book series, as the third book has a two-year time jump.

The Summer I Turned Pretty book two and season 2 ended with Belly leaving Conrad behind to pursue Jeremiah. The first two books and the first two seasons of the show take place while Belly is still in high school. That changes for the final chapter of the trilogy. In book three, readers are reintroduced to Belly and Jeremiah two years into their relationship, with Belly now having left high school behind and beginning to navigate college life.

9. Belly Attends Finch University With Jeremiah

The perfect scenario for her and Jeremiah’s relationship

In the book and in the television series, Jeremiah and Belly help Conrad to pass his final exams at Brown University. That’s not the only college setting in the series though. In The Summer I Turned Pretty season 2, Jeremiah also takes Belly to the Finch University campus, where he’ll be attending the following year. Her visit and her relationship with Jeremiah help to influence Belly’s ultimate decision on picking a university.

It will cause plenty of drama for the two of them

In book three, Belly also attends Finch (as does her best friend, Taylor), and it seems like the perfect scenario for her and Jeremiah’s relationship. Unfortunately, Belly and Jeremiah do not have the picture-perfect relationship in college that they intended when they started dating. It’ll certainly be interesting to see how the writers will adapt this as there’s no doubt it will cause plenty of drama for the two of them.

8. Belly & Conrad Haven’t Spoken In Two Years

Old feelings arise again after they cross paths

There was a time when Belly couldn’t imagine her summers without Conrad by her side. However, in The Summer I Turned Pretty book three, Conrad and Belly haven’t seen or spoken to each other in two years while Belly is dating his brother. It’s made clear that it’s simply too difficult for them with the history between them and Belly choosing to begin a relationship with Jeremiah.

The only exception was when they accidentally ran into each other at the Cousins Beach house at Christmastime. It’s pretty awkward when they have to be around each other while Belly is staying at the beach house in The Summer I Turned Pretty’s book three. Unsurprisingly, old feelings between Belly and Conrad arise again after they cross paths, reigniting the triangle again and creating some tense drama for the main characters.

7. Jeremiah Cheats On Belly

One of the biggest twists of all the storylines

Despite fighting for Belly’s affection and feuding with his brother over her, it turns out Jeremiah actually cheats on Belly when the two are finally together. The two got into an argument that led them to take a break from their relationship. Jeremiah saw the break not as a chance to reflect and figure out where he and Belly stand, but as an opportunity to be single again.

Jeremiah hooks up with a sorority girl named Lacie Barone, and Belly is crushed when she finds out that Jeremiah was with someone else while she remained loyal. It’s one of the biggest twists of all the storylines in the book, so there’s a huge chance the writers will include it in season 3. Belly’s relationships with both boys are seen as equally important to her, so for one of them to be unfaithful to her after she chooses them makes for maximum drama.

6. Belly & Jeremiah Get Engaged

He thinks it shows how serious he is about their relationship

Jeremiah believes proposing to Belly is the perfect apology after he hooks up with another girl. He thinks it shows how serious he is about their relationship. Despite how hurt she is, she accepts his proposal, and the two spend a good part of the third book engaged. Unfortunately, the two don’t have the fairytale wedding they’re hoping for.

Belly ends up dealing with all the wedding planning on her own as she and Jeremiah struggle to find an apartment together. They never truly seem to be on even ground when things get serious. It becomes evident their relationship is falling apart, which only worsens as she and Conrad begin spending more time together. Jeremiah’s jealousy of his brother and his knowing that Belly truly loves Conrad creates a rift in their relationship that they can’t really come back from.

5. Belly & Laurel Have A Falling Out

Conrad encourages their reunion

Belly and her mother, Laurel, have had the typical ups and downs any teenager has with their mother in The Summer I Turned Pretty books one and two. However, they’re always able to patch things up because they love each other. As seen in The Summer I Turned Pretty season 2, Laurel even shows up at the Cousins Beach house when Belly drunk dials her, and she helps Conrad and Jeremiah save their home. Unfortunately, things don’t go as smoothly between Belly and Laurel in book three.

Sadly, the two have a falling out because Laurel believes Belly and Jeremiah are too young to get engaged. Laurel won’t give Belly her blessing for the wedding, so Belly leaves home to stay at the Cousins Beach house. However, the two patch things up when Conrad meets up with Laurel and encourages their reunion. This leads Laurel to attend Belly’s bridal shower, bringing about a heartwarming reunion.

4. Jeremiah & Conrad’s Complicated Relationship Worsens

Jeremiah can’t hide his jealousy

Throughout The Summer I Turned Pretty books one and two and in the Amazon series, Jeremiah deals with jealousy toward his brother. In season 1, Jeremiah catches Belly and Conrad about to kiss, so he sets off fireworks in their direction to distract them. The tension between them worsens when Jeremiah finds out Conrad knew their mother, Susannah, had cancer but didn’t tell him. This causes him to punch Conrad in the face at the debutante ball.

In The Summer I Turned Pretty book three, it seems like Belly chose Jeremiah. Unfortunately, Belly’s feelings for Conrad are still there, and Jeremiah can’t hide his jealousy about that. The younger Fisher brother is furious when Belly tells him that Conrad confessed to her that he still loves her. This leads to another brutal fight between the brothers, like the one in The Summer I Turned Pretty season 1.

3. Belly Studies Abroad In Spain

3,000 miles away from the Cousins Beach house

After Belly is unable to tell Jeremiah she doesn’t have any feelings for Conrad anymore, they call off their marriage. That happens in the middle of Belly attending university, so she still has to make it through two more years of school after being confused about her feelings for Conrad and having her heartbroken by Jeremiah.

For Belly’s junior year of college, she needs a change of scenery, so she heads to Spain to study abroad. Despite being over 3,000 miles away from the Cousins Beach house, the Fisher brothers still have her attention. Despite the confusion and the distance, she remains in contact with both of them during her time in Spain. The third book reveals Belly and Jeremiah chatted online during her time abroad, but Conrad had a more romantic way of getting in contact with her.

2. Conrad Wins Belly Back With Love Letters

A tangible reason to favor Conrad over Jeremiah

The distance between Cousins Beach and Spain can’t keep Conrad and Belly apart. While Belly gets messages from both Jeremiah and Conrad in Spain, Conrad’s are decided more personal and hard to ignore. Conrad pursues Belly, writing her a series of love letters that she never responds to. However, after Conrad basically begs for a response, Belly finally sends a letter back.

This leads to Conrad and Belly regularly writing to each other, strengthening their bond once again. The love letters prove Conrad is serious about his everlasting love for Belly, and her response validates that despite what she’s said, she still has feelings for him too. This idea from Jenny Han is a much more personal touch than having the two text message or exchange emails, and it gives the reader a tangible reason to favor Conrad over Jeremiah at this point in the story.

1. Belly & Conrad Get Married

After about a year of dating

The Team Jeremiah vs. Team Conrad war ceases at the end of book three with a massive victory for those readers who belong to Team Conrad. Belly’s choice seemed obvious from the beginning because, despite her engagement to Jeremiah, it has always been Conrad for Belly; even Susannah could see that.

Conrad attends Belly’s college graduation (that’s over a year after him penning all those love letters to her), which brings them back together and jumpstarts their second relationship. After about a year of dating, Conrad proposes to Belly, and the book’s epilogue sequences their wedding. It’s unclear how closely The Summer I Turned Pretty season 3 will follow book three, but hints from the first two seasons suggest Belly and Conrad will end up together despite all of the drama between them, just like the book series.