I have a side project I am working on that focuses on public domain books.
Explores public domain works via a knowledge graph and AI Oracle.

Signal history
liveProduct memo
Babel Nexus Index offers a navigable knowledge graph of public domain works, drawing inspiration from classic discovery systems like Borges' Library of Babel and Vannevar Bush's Memex. It provides structured access to historical texts for researchers and explorers, enhanced by an AI Oracle and the ability to build and share associative trails. This approach positions it as a modern tool for engaging with archived knowledge.
For who
Researchers and explorers of public domain works
Solves what
Navigating and querying a structured archive of public domain books and papers
- Knowledge graph explorer
- AI-powered Oracle
- Associative trails
In their own words
Babel Nexus Index — A Discovery System for the Public Domain
A knowledge-graph explorer of the public domain.
Commercial cues
Model
free only
Free tier
Yes
Trial
No
Operator context
Team
Indie / lean
Founded
May 2026
Platform
Web app
Audience
General
Public footprint
Builder Strategy
- Strategy Type
- Niche Specialist
- Stage
- Pre Revenue
- Effort
- Solo Buildable
About Babel Nexus Index Expand
Babel Nexus Index provides a unique way to explore public domain works, offering a navigable knowledge graph for researchers and explorers. It helps users query and discover connections within a structured archive of historical books and papers.
The platform integrates an AI Oracle, powered by Google Gemini, to enhance discovery and allows users to create and share 'associative trails.' This approach positions Babel Nexus Index as a specialized tool for deep engagement with public domain content, moving beyond simple search to offer a more interconnected research experience.