What if the future could be edited - but the cost was always paid by someone else? Mara Vass is a data analyst in near-future London, fired for refusing to let a biased model quietly ruin lives. Hours later, she receives a letter that shouldn't exist - an invitation to St. Brigid's, a secret academic institution hidden in plain sight. Inside its vast underground library, Mara discovers the truth: some books don't describe the past. They describe futures. And with the right edits, those futures can be changed. The system is elegant. Terrifying. Every intervention must be balanced. Every saved life demands a loss elsewhere. Someone always pays - just never the person making the choice. As London edges toward a catastrophic crisis, Mara is drawn deeper into the machinery of the Library and into a dangerous alliance with another insider who has already sacrificed too much. Together, they uncover the most disturbing secret of all: entire futures are being borrowed from ordinary people, quietly stripped away to protect stability for the powerful. When the cost becomes personal, Mara faces an impossible decision - accept the rules, or attempt the unthinkable: rewriting the system itself. The Library of Borrowed Futures is a dark-academia, near-future thriller with a slow-burn romantic core. It explores power, ethics, and who gets to decide what - and who - is expendable in the name of order. If the future is a draft, who should be allowed to sign it?