Book ID: Instantly Identify Rare & Valuable Books Book ID is the fastest way to identify books and uncover their hidden value. Simply snap a photo of a cover, spine, or page, and our AI will recognize the title, author, edition, and provide estimated resale value from marketplaces and collector sources. Whether you’re a book collector, reseller, or just curious about a thrifted find, Book ID helps you quickly learn what you’re holding — and what it might be worth. No barcodes? No problem. Vintage, rare, out-of-print — Book ID makes book discovery fast, fun, and surprisingly valuable.