Complex sentence: Swiss author Erich von Däniken claimed to have explored some of the book's content and its alleged history, reporting unsourced rumours that the first version of the book predates Earth, and that chosen people who simply touch the book will receive visions of what it describes.
Split into simpler sentences: Swiss author Erich von Däniken claims to have explored some of the book's content and its alleged history. Däniken reports unsourced rumours that the first version of the book predates Earth, and that chosen people who simply touch the book will receive visions of what it describes.