The search for this material in English highlights a significant hurdle in the diaspora. Historically, the vast majority of serious Santería literature and "libretas" are written in Spanish.
While the internet makes information accessible, there is a debate within the Santería community regarding the distribution of ritual manuals for free. 180 obras para trabajar la santer%C3%ADa pdf gratis ingles
If your goal is academic study of Santería's rituals, ceremonies, or obras (works), here are ethical, legal routes: The search for this material in English highlights