Complex sentence: While the novels use "Inderlander" to refer to all of the supernatural beings that revealed themselves during the Turn, they are divided into two main groups: those that are derived from humans and those that are non-human in origin.
Split into simpler sentences: While the novels use "Inderlander" to refer to all of the supernatural beings that revealed themselves during the Turn. They are divided into two main groups: those that are derived from humans and those that are non-human in origin.