Los Tres Principios Fundamentales Y Sus Pruebas (The Three Fundamentals and their Evidences) is a phenomenal book written in the Spanish language. It has been authored by Muhammad bin Abdul Wahaab.It reveals the three fundamental principles of Islam with evidences. Extremely reasonable, with the best quality paper, this book is a must have for all our Spanish readers.
Other Sources:
Riyad-us-Saliheen: Its significance and a brief biography of Imam Nawawi
Root Cause behind Muslim mapping in Southern California, USA