Lola Tung in The Summer I Turned Pretty. (Eddy Chen/Prime)The Summer I Turned Pretty just dropped the official trailer for the final three episodes of the series. With the beloved Prime Video series now being off-book, the trailer, released on Friday, finally gives fans a taste of what's to come.Based on Jenny Han's bestselling novels of the same name, the hit series follows protagonist Isabel "Belly" Conklin (Lola Tung) as she comes of age, all while navigating a perilous love triangle with brothers Conrad (Chris Briney) and Jeremiah Fisher (Gavin Casalegno).