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Find BOOKS matching a topic. Searches titles, authors, subjects, and (as a secondary signal) translated text. Use this when you want a list of works o

Find specific PASSAGES inside books — returns page-level snippets with citation URLs. Use this when you want a quote or evidence on a topic across the

Conceptual / semantic passage search across the whole library. Use when the modern term won't literally appear in historical texts — e.g. "distributed

Deep-dive inside a single book. Runs Atlas keyword search AND scoped semantic search in parallel against that book's pages, then merges results — so t

Browse the catalog by metadata — filter by author/title fragment, language, category, or translation recency. Returns books with title, author, langua

Get a book's AI-generated summary, chapter list, edition metadata, DOI, and page counts. THIS IS THE RIGHT FIRST CALL whenever the user has named a sp

Read a book's text. Preferred: use the chapter param to read one chapter at a time (includes [Page N] markers for citation) — call get_book first to g

Get exact text of a single page for quoting, with citation URL. ALWAYS use before putting text in quotation marks.

Search 110,000+ historical illustrations, emblems, engravings, diagrams, AND 23,000+ artworks (paintings, prints, sculptures). Filter by type, subject

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