Recursos em acesso livre – Livros electrónicos

Bartleby.com

Biblioteca Nacional Digital

Bookyards

Classiques des Sciences Sociales

DOAB – Directory of Open Acess Books

EU Bookshop

Free-ebooks

Human Sciences Research Council Press

Intech Open Science Books

Ler Ebooks

Livros Grátis

OpenEdition Books 

OAPEN – Open Access Publishing in European Networks

Pombalina

Project Gutenberg

Questia Free Books

Rand Books & Publications

Virtual Books

World Digital Library – Biblioteca Digital Mundial