Seb Bouin is undeniably one of the world's strongest sport climbers. But the tiny crimps and pockets of Céüse—France's most iconic crag—are self-admittedly his anti-style. Yet, the strong Frenchman revels in the uncertain process of pushing his own limits. So in 2023, having recently dispatched his longstanding DNA project, Seb devoted himself to Céüse's hardest route—Bibliographie 9b+ (5.15c). Follow Seb's journey, fraught with failure, to climb one of the world's hardest routes.