BookHaven is a full-featured library management system built with React. It allows users to browse, borrow, and return books easily from an organized collection. Secure user authentication is handled through Firebase Authentication. Users can filter books by category, genre, or search by title/author. Each book includes detailed info, including availability and description. The borrowing system tracks available quantities and due return dates. Users can view their borrowed books and return them with one click. The responsive UI ensures smooth performance across all devices. Modern technologies like React Router, Tailwind CSS, and Axios are used. SweetAlert2 enhances the user experience with clean and intuitive popups.