The author served as writer, co-showrunner and executive producer on the Prime Video series, and being a "perfectionist" made it an all-encompassing job

I Turned Pretty focuses on the love triangle between Isabel “Belly” Conklin (Lola Tung) and brothers Conrad (Christopher Briney) and Jeremiah (Gavin Casalegno). It’s based on author Jenny Han’s coming-of-age romantic drama book series of the same name.

You might think you know how The Summer I Turn Pretty will end, but according to author Jenny Han, you have no idea. Speaking about the third and final season of the Prime Video hit series, Jenny Han teased The Summer I Turned Pretty season 3 ending, suggesting that the show might end without resolving the love triangle (gasp!).

I Turned Pretty' season 3 begins, Jenny Han weighs in on a burning question fans face in the aftermath of Jeremiah's betrayal of Belly: Did he cheat? She tells PEOPLE what she thinks.

I Turned Pretty' didn't provide book context before Conrad found out that Belly is engaged to his brother, Jeremiah

Here are all the times a Taylor Swift song provided the soundtrack for the Amazon Prime series, including on Season Three.

NPR's Susan Davis speaks with actor Lola Tung and co-showrunner Jenny Han about their new Prime Video series, "The Summer I Turned Pretty," about a pivotal summer in the life of one teenager.