Titles in This Set. Flawed. Perfect. Details. Condition: New. Format: Paperback. ISBN (Flawed): 9780008125127. ISBN (Perfect): 9780008125165. Publisher: HarperCollins Children's Books. Age Range: 13+. Overview. Step into a chilling world where a single mistake can brand you an outcast forever. This paperback set brings together both books in Cecelia Ahern's gripping YA duology, Flawed and Perfect, following Celestine North as she battles a society obsessed with perfection. Packed with tense courtroom drama, forbidden romance and hard moral choices, this two-book collection is a must-have for teen and adult readers who love thought-provoking dystopian fiction with real emotional stakes.. About the Books. In Flawed, Celestine North seems to have the perfect life — popular, dependable and dating the Judge's charming son. But when she makes an instinctive decision to help a stranger, she breaks one of society's sacred Guild rules and is arrested, put on trial and branded FLAWED, marked both literally and publicly as imperfect. Stripped of her old life, Celestine must navigate a world that now sees her as dangerous simply for being human.. The story continues in Perfect, where Celestine is a fugitive from Judge Crevan's regime, forced to decide whether to fight the system that condemned her or disappear and save herself. As the net closes in and the true cost of "perfection" is revealed, Celestine must choose between safety and standing up for every person branded Flawed. Together, these two novels form a complete, satisfying arc that explores identity, justice, conformity and the courage it takes to challenge an unjust system. Ahern balances fast-paced plotting with genuine emotional depth, making this duology a favourite with teen readers, book clubs and dystopian fiction fans alike.. Complete two-book duology in one convenient paperback set. Gripping dystopian premise with a strong, relatable teen heroine. Explores identity, justice and morality — ideal for book clubs and classroom discussion. Written by internationally bestselling author Cecelia Ahern. Lightweight paperback format, perfect for gifting, travel or shelf display. Brand new condition — a great addition to any young adult book collection. About the Author. Cecelia Ahern is an internationally bestselling Irish author whose novels have been translated into over thirty languages and sold millions of copies worldwide. She first found fame with her debut adult novel PS, I Love You, later adapted into a hit film. With Flawed, her acclaimed first foray into young adult fiction, Ahern brought her signature blend of heart and high-stakes storytelling to a new generation of readers, proving her versatility across genres.. Why You'll Love This Duology. Fast-paced, thought-provoking and emotionally charged, Flawed and Perfect deliver a dystopian world you won't want to leave. Perfect for teens and adults who love strong heroines, moral complexity and a story that lingers long after the final page.. Please Note: Book cover may vary from image shown and is dependent on stock available at the time. ISBNs refer to the UK paperback editions.