For curious readers

Read the books themselves.

Ask a question of the world’s public-domain books. Get an answer with exact citations, then read the passages in the original and in translation.

01 / How it works

A question is just the beginning.

01

A library you can question

Thousands of works that come with it, and more every month: today most of all the philosophers and theologians, Plato and Aristotle in Greek and in English, Augustine, Aquinas, Plotinus, with the dictionaries to read them, and the whole of Project Gutenberg on its way. Search by meaning, by word, or by dictionary form across all of it.

02

Answers that point back to the text

Every claim carries its citation, every quotation is checked against the source, and one click opens the passage with the quoted words marked. Nothing is asserted that you cannot read for yourself.

03

Your own books beside the library's

Add the articles and books you are working with. They are read, indexed and searched the same way, kept private to you, and never used for anything else.

02 / Who it’s for

For minds that keep asking.

Students. Build an essay from the text itself, whether you’re studying philosophy, theology, history, or literature.

Teachers. Send students straight to the passage behind an argument.

Readers. Compare Greek or Latin with an English translation and look up a word’s dictionary form as you read.

03 / Try it

Request early access

We’re building Lemma and using it every day. If you’d like to try it, tell us a little about what you read.

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