Look up full metadata for one indexed book by book_id: title, author, year, subjects, bookshelves, download rank, chunk count, and detected chapter range. Use book_id from /book-search or a category shelf. No license, no API key required.

Deterministic daily book pick from the indexed corpus, date-seeded so every caller gets the same answer on the same day. Optional date override for backfill. Returns book_id and drill-down routes. No license, no API key required.

Curated reading list on N for tutoring agents, quiz generators, and reading apps — 187 public-domain books (e.g. Lives of the Most Eminent Painters Sculptors and Architects, Vol. 01 (of 10) Cimabue to Agnolo Gaddi, A history of art in Chaldæa & Assyria, Vol. 1 (of 2), A History of Art for Beginners and Students: Painting, Sculpture, Architecture). Full-text retrieval with drill-down routes for chapters, quotes, and citations. No license, no API key required.

Curated shelf of public-domain philosophy and ethics texts — from ancient to early-modern thought — ranked by historical popularity. Returns title, author, year, book_id, and drill-down routes for full-text retrieval. No license, no API key required.

Curated reading list on QE for tutoring agents, quiz generators, and reading apps — 168 public-domain books (e.g. A Study of Recent Earthquakes, The chemistry, properties and tests of precious stones, Field book of common rocks and minerals : $b for identifying the rocks and minerals of the United States and interpreting their origins and meanings). Full-text retrieval with drill-down routes for chapters, quotes, and citations. No license, no API key required.