"Gaudí inacabado" is a textbook that focuses on exploring secrets and mysteries in Spanish culture. It is aimed at learners of the Spanish language, particularly teenagers and adults at the A2-B1 proficiency levels. Through captivating stories, the book offers an entertaining way to practice Spanish while also acquiring valuable cultural knowledge. The didactic approach includes both text comprehension and creative writing exercises. Additionally, the book contains lexical notes that help learners significantly expand their vocabulary. The content aligns with the guidelines of the Instituto Cervantes curriculum, highlighting the quality and relevance of the material.