This volume serves as a structured pedagogical instrument designed to advance the learner from foundational Spanish to intermediate proficiency through systematic linguistic drills. Authored by Robert P. Stockwell for the Foreign Service Institute, the text utilizes a rigorous audio-lingual methodology. It focuses on the acquisition of complex grammatical structures, expanded vocabulary, and idiomatic expressions necessary for professional diplomatic communication. The material is organized into fifteen distinct units, each building upon the phonetic and syntactic foundations established in the preceding volume.

Linguists and educators frequently cite this series as a foundational, albeit highly traditional, resource for intensive language acquisition. Readers often note the academic density of the prose and the requirement for consistent, disciplined practice to achieve the intended learning outcomes.