Find connections across 100 books with Claude Code

Try it yourself

What you get

Browsable trails of connected ideas across a library of books.

Tools

• Claude Code
• Gemini Flash Lite (topic indexing, per author)
• Embeddings

Time / cost: Indexing the library cost about £10 (per author)

Steps

1. Split the books into chunks and index them by topic.
2. Organize the topics into a tree.
3. Give Claude Code CLI tools to search the library, then let it explore and build trails.

Copy-ready prompt

You have CLI tools to search my book library by topic, embedding similarity and co-occurring topics. Explore and find 5 surprising connections between ideas in different books. For each one, give the chain of excerpts with book titles, and explain the link in two sentences.

Prompt written by AgentPlays from the source. Fill in the [brackets] and approve before anything is sent or bought.

Proof / source

Detailed write-up Author's Show HN post and the live site (trails.pieterma.es).