Zadig, and Other Stories; Chosen and Edited with an Introd. , Notes, and a Vocabulary by Irving Babbitt

Micromegas

Treatise on Toleration

Candide

Fanaticism, or Mahomet the Prophet

A Pocket Philosophical Dictionary

Dictionnaire philosophique

Zadig

The dog and the horse

The portable Voltaire

Cándido y otros cuentos (Candide, ou l'optimisme / L'Homme aux quarente écus / Memnon, ou la sagesse humaine / Micromégas / Voyages de Scarmentado)