Complex sentence: He wrote the foreword to Fritz Zorn's controversial memoirs "Mars", a book that pointed out the supposedly "cancer-causing" lifestyle of Zurich's wealthy gold coast, provoked a scandal in Switzerland, and whose author died of cancer before its release.
Split into simpler sentences: He wrote the foreword to Fritz Zorn's controversial memoirs "Mars". The book pointed out the supposedly "cancer-causing" lifestyle of Zurich's wealthy gold coast and provoked a scandal in Switzerland; its author died of cancer before its release.