Complex sentence: The series blends magic and primitive technology and the books are set in the Four Lands which in some books is identified as Earth long after civilization as we know it was destroyed in a chemical and nuclear holocaust called the Great Wars.
Split into simpler sentences: The series blends magic and primitive technology and is set in the Four Lands. In some books the Four Lands are identified as Earth long after civilization was destroyed in a chemical and nuclear holocaust called the Great Wars.