Complex sentence: In his book`s prologue, Sar Giss explained the title of his book: "Fernwe" is a category of a feeling when you miss a place you have never been before, and "Threeluminati" is a three-dimensional illumination process of the spirit.
Split into simpler sentences: In his book`s prologue, Sar Giss explained the title of his book Fernwe is a category of a feeling when you miss a place you have never been before. Threeluminati is a three-dimensional illumination process of the spirit.