- El Mundo Blanco (B2-C1 Advanced Level) -- Spanish Graded Readers with Explanations of the Language
- Un Planeta Rojo (B1-B2 Intermediate Level) -- Student's Book: Without Answers (Spanish Graded Readers)
- El Planeta del Desierto Amarillo (A2-B1 Introductory Level) -- Spanish Graded Readers with Explanations of the Language
- El Mundo Blanco (B2-C1 Advanced Level) -- Student's Book: Without Answers (Spanish Graded Readers)
- El Planeta del Desierto Amarillo (A2-B1 Introductory Level) -- Student's Book: Without Answers (Spanish Graded Readers)