Design an Ebook Distribution Platform

Functional Requirements:

• User Registration & Authentication: Users (authors, publishers, readers) can sign up, log in, and manage their profiles securely.
• Ebook Upload: Authors/publishers can upload ebooks in common formats (e.g., EPUB, PDF, MOBI) with metadata (title, author, genre, description).
• Ebook Browsing & Search: Readers can browse, filter, and search for ebooks by title, author, or genre.
• Ebook Purchase & Download: Readers can purchase and download ebooks they are authorized to access.
• DRM Support: Protect ebooks from unauthorized access and sharing (optional for MVP).
• User Library: Readers can view and manage their purchased/downloaded ebooks.
• Basic Recommendations: Suggest ebooks to users based on simple rules (e.g., genre, popular titles).

Non-Functional Requirements:

• Scalability: System should handle growth in users and ebook catalog.
• Availability: High uptime for core features (browsing, purchasing, downloading).
• Performance: Ebook downloads and searches should respond within a few seconds.
• Security: Protect user data and ebook files; secure payment processing.
• Data Consistency: Ensure users see accurate purchase and library information.
• Usability: Simple, intuitive interfaces for all user roles.