Santeria; African Magic in Latin America
Santería, also known as "The Way of the Saints", is an Afro-Cuban religious tradition derived from traditional beliefs of the Yoruba people of what is now known as Nigeria. The Santería tradition comprises a hierarchical structure according to priesthood level and authority. The "Seven Powers of God" or "Siete Potencia" are; Elegua, Oggun, Oshun, Chango, Obatala', Yemeya and Onrula. These are the most common Orisha names.
Santeria; African Magic in Latin America By Migen Gonzalez-Wippler will help those that are curious about the rituals and practices of Santeria. If you want to delve deeper into the meanings and why Santeria exists, then this book will help to answer your questions.