Hardcover Labs: Popular Books by Month

Popular Books by Month is a data visualization tool within Hardcover Labs that displays the top 15 trending books across any selected time period. Users can filter by title, author, or series name, and adjust the date range using an interactive slider to explore reading trends from 2022 onward. The bump chart connects each book's monthly ranking over time, allowing readers to see how popularity shifts and to highlight individual titles or series.

The tool is designed for book enthusiasts and data visualization fans who want to understand reading trends historically. The maker reports it was built primarily with Claude Code and Claude Opus 4.5, using Ruby on Rails and React.js on the backend and frontend respectively, with D3.js handling the visualization logic.