What does it mean for the spirit world to be real? Scholars from different disciplines investigate this topic focusing on the role played by the spiritual realm in Pentecostalized Africa. The grammatical angle of their research proves to be a fruitful avenue to clarify the kind of reality or realities the spirit world has. This novel approach takes us beyond most existing research by investigating the often unaddressed assumption that we know what it means for the spirit world to be taken as real. This volume shows the importance of paying close attention to the grammar according to which people speak of spirits, Spirit, witchcraft, ancestors and other aspects of the spirit world.