· scroll on to see the main differences which had taken place on the show compared to the books so far: The last chapter, called at last, arrived in september 2025 and made clear how far it drifted from the book ’ s ending. · find the biggest differences between the tv series and jenny hans beloved book series · those whove read the books might have already identified these modified details from the show, but heres a comprehensive guide to all the differences between the summer i turned. · after three seasons, the summer i turned pretty came to a close on tv. The summer i turned pretty season 3 features several major differences from the book series written by jenny han. Get the details here. · from susannahs big secret to how bellys love story unfolded, here are the biggest differences between the summer i turned pretty book trilogy and the prime video show. · check out the changes made across the three seasons of the summer i turned pretty , starting with season 3 and working backwards, below: