When you download the in Spanish, you will notice:
Do not buy expensive reprints without checking this public domain PDF first. It is freely (and ethically) available online. Pay for the paper version only if you plan to bleed ink on it with notes. luz en el sendero pdf
La Sociedad Teosófica en Español tiene un repositorio oficial con clásicos de la literatura ocultista. When you download the in Spanish, you will