Lola Tung and Chris Briney in Season 3 of The Summer I Turned Pretty. (Erika Doss/Prime)The Summer I Turned Pretty is officially taking its fandom into uncharted territory.The Jenny Han-created coming-of-age series, which is based on the trilogy of books she also penned, dropped Episode 8 of Season 3 on Wednesday. By the end of the episode, fans were confronted with a reality both exhilarating and nerve-racking: The show has finally caught up with and moved past its source material. We are, to put it simply, officially off-book.The final moments of Wednesday's episode were proof of this fact.