Give Oswin a field of expertise overnight.
Curated, cleaned and pre-indexed libraries you download once and own forever. They land in your library with full citation metadata, so the notes come out right the first time. Pay once; no subscription.
Where the texts come from
Public-domain and openly licensed works: Wikipedia, Project Gutenberg, open-access journals, government publications. You're paying for the cleaning, the metadata and the index, not the words.
Updated, not expiring
Buy a pack and every future revision is yours. Wikipedia and open-access packs are refreshed twice a year.
Bring your own
Packs sit alongside your own files in the same library. Tag them, search them together, or restrict a question to one collection.
Start with the free packs.
The Starter Shelf and Open Papers Sampler come with every install.