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Improving the PDF download experience involves technical and user-friendly strategies:

Check out popular e-book stores like:

| # | Story | Acceptance Criteria | |---|-------|----------------------| | U1 | As a visitor I want to search for the novel by title, author, or ISBN. | • Search box returns results within 500 ms.
• Results show source name, legality badge, file size, and format. | | U2 | As a user I want to filter results to show only legal, free PDFs or paid e‑books. | • Toggle “Free only” / “Paid only”.
• Each result displays a clear “Free / Paid” label with a link to the source’s licensing page. | | U3 | As a user I want a preview of the PDF (first 2‑3 pages) before I download. | • Click “Preview” opens a modal with a low‑resolution render.
• Preview respects source‑provided DRM (e.g., watermarks). | | U4 | As a user I want to download the PDF with a single click, and see a progress bar. | • One‑click “Download” initiates a resumable HTTP range request.
• Progress bar updates in real‑time; users can pause/resume. | | U5 | As a user I want the file to be auto‑named in a consistent, searchable format. | • Naming template: Title - Author (Year) [PDF].pdf.
• If the source supplies a better title, it overrides the template. | | U6 | As a user I want the app to store metadata (author, cover, synopsis) locally for quick reference. | • Metadata saved in IndexedDB / SQLite (mobile) and displayed on the library screen. | | U7 | As a user I want to read the PDF inside the app without leaving it. | • Integrated PDF.js viewer with night‑mode, bookmarking, and text‑search. | | U8 | As a user I want to share a legal source link with friends. | • “Copy link” button copies the source URL (not the PDF file). | | U9 | As a site admin I want to audit which sources are flagged as “potentially infringing”. | • Admin dashboard shows URLs flagged by community or automated checks, with the ability to hide them. |

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